Add MergeUsageAnalyzer to detect legacy merge service usage

- Implemented MergeUsageAnalyzer to flag usage of AdvisoryMergeService and AddMergeModule.
- Created AnalyzerReleases.Shipped.md and AnalyzerReleases.Unshipped.md for release documentation.
- Added tests for MergeUsageAnalyzer to ensure correct diagnostics for various scenarios.
- Updated project files for analyzers and tests to include necessary dependencies and configurations.
- Introduced a sample report structure for scanner output.

src/Scanner/__Tests/StellaOps.Scanner.WebService.Tests/ReportEventDispatcherTests.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
@@ -16,108 +16,108 @@ using StellaOps.Policy;
 using StellaOps.Scanner.WebService.Contracts;
 using StellaOps.Scanner.WebService.Options;
 using StellaOps.Scanner.WebService.Services;
-
-namespace StellaOps.Scanner.WebService.Tests;
-
-public sealed class ReportEventDispatcherTests
-{
-    private static readonly JsonSerializerOptions SerializerOptions = new(JsonSerializerDefaults.Web)
-    {
-        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
-    };
-
-    [Fact]
-    public async Task PublishAsync_EmitsReportReadyAndScanCompleted()
-    {
-        var publisher = new RecordingEventPublisher();
+
+namespace StellaOps.Scanner.WebService.Tests;
+
+public sealed class ReportEventDispatcherTests
+{
+    private static readonly JsonSerializerOptions SerializerOptions = new(JsonSerializerDefaults.Web)
+    {
+        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
+    };
+
+    [Fact]
+    public async Task PublishAsync_EmitsReportReadyAndScanCompleted()
+    {
+        var publisher = new RecordingEventPublisher();
         var dispatcher = new ReportEventDispatcher(publisher, Microsoft.Extensions.Options.Options.Create(new ScannerWebServiceOptions()), TimeProvider.System, NullLogger<ReportEventDispatcher>.Instance);
-        var cancellationToken = CancellationToken.None;
-
-        var request = new ReportRequestDto
-        {
-            ImageDigest = "sha256:feedface",
-            Findings = new[]
-            {
-                new PolicyPreviewFindingDto
-                {
-                    Id = "finding-1",
-                    Severity = "Critical",
-                    Repository = "acme/edge/api",
-                    Cve = "CVE-2024-9999",
-                    Tags = new[] { "reachability:runtime", "kev:CVE-2024-9999" }
-                }
-            }
-        };
-
-        var baseline = new PolicyVerdict("finding-1", PolicyVerdictStatus.Pass, ConfigVersion: "1.0");
-        var projected = new PolicyVerdict(
-            "finding-1",
-            PolicyVerdictStatus.Blocked,
-            Score: 47.5,
-            ConfigVersion: "1.0",
-            SourceTrust: "NVD",
-            Reachability: "runtime");
-
-        var preview = new PolicyPreviewResponse(
-            Success: true,
-            PolicyDigest: "digest-123",
-            RevisionId: "rev-42",
-            Issues: ImmutableArray<PolicyIssue>.Empty,
-            Diffs: ImmutableArray.Create(new PolicyVerdictDiff(baseline, projected)),
-            ChangedCount: 1);
-
-        var document = new ReportDocumentDto
-        {
-            ReportId = "report-abc",
-            ImageDigest = "sha256:feedface",
-            GeneratedAt = DateTimeOffset.Parse("2025-10-19T12:34:56Z"),
-            Verdict = "blocked",
-            Policy = new ReportPolicyDto
-            {
-                RevisionId = "rev-42",
-                Digest = "digest-123"
-            },
-            Summary = new ReportSummaryDto
-            {
-                Total = 1,
-                Blocked = 1,
-                Warned = 0,
-                Ignored = 0,
-                Quieted = 0
-            },
-            Verdicts = new[]
-            {
-                new PolicyPreviewVerdictDto
-                {
-                    FindingId = "finding-1",
-                    Status = "Blocked",
-                    Score = 47.5,
-                    SourceTrust = "NVD",
-                    Reachability = "runtime"
-                }
-            }
-        };
-
-        var envelope = new DsseEnvelopeDto
-        {
-            PayloadType = "application/vnd.stellaops.report+json",
-            Payload = Convert.ToBase64String(JsonSerializer.SerializeToUtf8Bytes(document, SerializerOptions)),
-            Signatures = new[]
-            {
-                new DsseSignatureDto { KeyId = "test-key", Algorithm = "hs256", Signature = "signature-value" }
-            }
-        };
-
-        var context = new DefaultHttpContext();
-        context.User = new ClaimsPrincipal(new ClaimsIdentity(new[]
-        {
-            new Claim(StellaOpsClaimTypes.Tenant, "tenant-alpha")
-        }));
-        context.Request.Scheme = "https";
-        context.Request.Host = new HostString("scanner.example");
-
-        await dispatcher.PublishAsync(request, preview, document, envelope, context, cancellationToken);
-
+        var cancellationToken = CancellationToken.None;
+
+        var request = new ReportRequestDto
+        {
+            ImageDigest = "sha256:feedface",
+            Findings = new[]
+            {
+                new PolicyPreviewFindingDto
+                {
+                    Id = "finding-1",
+                    Severity = "Critical",
+                    Repository = "acme/edge/api",
+                    Cve = "CVE-2024-9999",
+                    Tags = new[] { "reachability:runtime", "kev:CVE-2024-9999" }
+                }
+            }
+        };
+
+        var baseline = new PolicyVerdict("finding-1", PolicyVerdictStatus.Pass, ConfigVersion: "1.0");
+        var projected = new PolicyVerdict(
+            "finding-1",
+            PolicyVerdictStatus.Blocked,
+            Score: 47.5,
+            ConfigVersion: "1.0",
+            SourceTrust: "NVD",
+            Reachability: "runtime");
+
+        var preview = new PolicyPreviewResponse(
+            Success: true,
+            PolicyDigest: "digest-123",
+            RevisionId: "rev-42",
+            Issues: ImmutableArray<PolicyIssue>.Empty,
+            Diffs: ImmutableArray.Create(new PolicyVerdictDiff(baseline, projected)),
+            ChangedCount: 1);
+
+        var document = new ReportDocumentDto
+        {
+            ReportId = "report-abc",
+            ImageDigest = "sha256:feedface",
+            GeneratedAt = DateTimeOffset.Parse("2025-10-19T12:34:56Z"),
+            Verdict = "blocked",
+            Policy = new ReportPolicyDto
+            {
+                RevisionId = "rev-42",
+                Digest = "digest-123"
+            },
+            Summary = new ReportSummaryDto
+            {
+                Total = 1,
+                Blocked = 1,
+                Warned = 0,
+                Ignored = 0,
+                Quieted = 0
+            },
+            Verdicts = new[]
+            {
+                new PolicyPreviewVerdictDto
+                {
+                    FindingId = "finding-1",
+                    Status = "Blocked",
+                    Score = 47.5,
+                    SourceTrust = "NVD",
+                    Reachability = "runtime"
+                }
+            }
+        };
+
+        var envelope = new DsseEnvelopeDto
+        {
+            PayloadType = "application/vnd.stellaops.report+json",
+            Payload = Convert.ToBase64String(JsonSerializer.SerializeToUtf8Bytes(document, SerializerOptions)),
+            Signatures = new[]
+            {
+                new DsseSignatureDto { KeyId = "test-key", Algorithm = "hs256", Signature = "signature-value" }
+            }
+        };
+
+        var context = new DefaultHttpContext();
+        context.User = new ClaimsPrincipal(new ClaimsIdentity(new[]
+        {
+            new Claim(StellaOpsClaimTypes.Tenant, "tenant-alpha")
+        }));
+        context.Request.Scheme = "https";
+        context.Request.Host = new HostString("scanner.example");
+
+        await dispatcher.PublishAsync(request, preview, document, envelope, context, cancellationToken);
+
         Assert.Equal(2, publisher.Events.Count);
 
         var readyEvent = Assert.Single(publisher.Events, evt => evt.Kind == OrchestratorEventKinds.ScannerReportReady);
@@ -165,6 +165,126 @@ public sealed class ReportEventDispatcherTests
         Assert.Equal("blocked", scanPayload.Report.Verdict);
     }
 
+    [Fact]
+    public async Task PublishAsync_HonoursConfiguredConsoleAndApiSegments()
+    {
+        var options = Microsoft.Extensions.Options.Options.Create(new ScannerWebServiceOptions
+        {
+            Api = new ScannerWebServiceOptions.ApiOptions
+            {
+                BasePath = "/custom-api",
+                ReportsSegment = "reports-view",
+                PolicySegment = "policy-hub"
+            },
+            Console = new ScannerWebServiceOptions.ConsoleOptions
+            {
+                BasePath = "/console",
+                ReportsSegment = "insights",
+                PolicySegment = "policy-center",
+                AttestationsSegment = "evidence"
+            }
+        });
+
+        var publisher = new RecordingEventPublisher();
+        var dispatcher = new ReportEventDispatcher(publisher, options, TimeProvider.System, NullLogger<ReportEventDispatcher>.Instance);
+        var cancellationToken = CancellationToken.None;
+
+        var request = new ReportRequestDto
+        {
+            ImageDigest = "sha256:feedface",
+            Findings = new[]
+            {
+                new PolicyPreviewFindingDto
+                {
+                    Id = "finding-1",
+                    Severity = "Critical",
+                    Repository = "acme/edge/api",
+                    Cve = "CVE-2024-9999",
+                    Tags = new[] { "reachability:runtime", "kev:CVE-2024-9999" }
+                }
+            }
+        };
+
+        var baseline = new PolicyVerdict("finding-1", PolicyVerdictStatus.Pass, ConfigVersion: "1.0");
+        var projected = new PolicyVerdict(
+            "finding-1",
+            PolicyVerdictStatus.Blocked,
+            Score: 47.5,
+            ConfigVersion: "1.0",
+            SourceTrust: "NVD",
+            Reachability: "runtime");
+
+        var preview = new PolicyPreviewResponse(
+            Success: true,
+            PolicyDigest: "digest-123",
+            RevisionId: "rev-42",
+            Issues: ImmutableArray<PolicyIssue>.Empty,
+            Diffs: ImmutableArray.Create(new PolicyVerdictDiff(baseline, projected)),
+            ChangedCount: 1);
+
+        var document = new ReportDocumentDto
+        {
+            ReportId = "report-abc",
+            ImageDigest = "sha256:feedface",
+            GeneratedAt = DateTimeOffset.Parse("2025-10-19T12:34:56Z"),
+            Verdict = "blocked",
+            Policy = new ReportPolicyDto
+            {
+                RevisionId = "rev-42",
+                Digest = "digest-123"
+            },
+            Summary = new ReportSummaryDto
+            {
+                Total = 1,
+                Blocked = 1,
+                Warned = 0,
+                Ignored = 0,
+                Quieted = 0
+            },
+            Verdicts = new[]
+            {
+                new PolicyPreviewVerdictDto
+                {
+                    FindingId = "finding-1",
+                    Status = "Blocked",
+                    Score = 47.5,
+                    SourceTrust = "NVD",
+                    Reachability = "runtime"
+                }
+            }
+        };
+
+        var envelope = new DsseEnvelopeDto
+        {
+            PayloadType = "application/vnd.stellaops.report+json",
+            Payload = Convert.ToBase64String(JsonSerializer.SerializeToUtf8Bytes(document, SerializerOptions)),
+            Signatures = new[]
+            {
+                new DsseSignatureDto { KeyId = "test-key", Algorithm = "hs256", Signature = "signature-value" }
+            }
+        };
+
+        var context = new DefaultHttpContext();
+        context.User = new ClaimsPrincipal(new ClaimsIdentity(new[]
+        {
+            new Claim(StellaOpsClaimTypes.Tenant, "tenant-alpha")
+        }));
+        context.Request.Scheme = "https";
+        context.Request.Host = new HostString("scanner.example");
+
+        await dispatcher.PublishAsync(request, preview, document, envelope, context, cancellationToken);
+
+        var readyEvent = Assert.Single(publisher.Events, evt => evt.Kind == OrchestratorEventKinds.ScannerReportReady);
+        var links = Assert.IsType<ReportReadyEventPayload>(readyEvent.Payload).Links;
+
+        Assert.Equal("https://scanner.example/console/insights/report-abc", links.Report?.Ui);
+        Assert.Equal("https://scanner.example/custom-api/reports-view/report-abc", links.Report?.Api);
+        Assert.Equal("https://scanner.example/console/policy-center/revisions/rev-42", links.Policy?.Ui);
+        Assert.Equal("https://scanner.example/custom-api/policy-hub/revisions/rev-42", links.Policy?.Api);
+        Assert.Equal("https://scanner.example/console/evidence/report-abc", links.Attestation?.Ui);
+        Assert.Equal("https://scanner.example/custom-api/reports-view/report-abc/attestation", links.Attestation?.Api);
+    }
+
     private sealed class RecordingEventPublisher : IPlatformEventPublisher
     {
         public List<OrchestratorEvent> Events { get; } = new();
@@ -173,6 +293,6 @@ public sealed class ReportEventDispatcherTests
         {
             Events.Add(@event);
             return Task.CompletedTask;
-        }
-    }
-}
+        }
+    }
+}