Fix critical journey blockers: audit endpoints, registry mock, topology auth

Fix #20 — Audit log empty:
  Wire app.MapAuditEndpoints() in JobEngine Program.cs. The endpoint file
  existed but was never registered, so /api/v1/jobengine/audit returned 404
  and the Timeline unified aggregation service got 0 events.

Fix #22 — Registry search returns mock data:
  Replace the catchError() synthetic mock fallback in searchImages() with
  an empty array return. The release wizard will now show "no results"
  instead of fabricating fake "payment-service" with "sha256:payment..."
  digests. getImageDigests() returns an empty-tags placeholder on failure.

Fix #13 — Topology wizard 401 (identity envelope passthrough):
  Add TryAuthenticateFromIdentityEnvelope() to Concelier's JwtBearer
  OnMessageReceived handler. When no JWT bearer token is present (stripped
  by gateway's IdentityHeaderPolicyMiddleware on ReverseProxy routes),
  the handler reads X-StellaOps-Identity-Envelope + signature headers,
  verifies the HMAC-SHA256 signature using the shared signing key, and
  populates ClaimsPrincipal with subject/tenant/scopes/roles from the
  envelope. This enables ReverseProxy routes to Concelier topology
  endpoints to authenticate the same way Microservice/Valkey routes do.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Concelier/StellaOps.Concelier.WebService/Program.cs

@@ -62,6 +62,7 @@ using StellaOps.Plugin.Hosting;
 using StellaOps.Provenance;
 using StellaOps.Localization;
 using StellaOps.Router.AspNet;
+using StellaOps.Router.Common.Identity;
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
@@ -846,6 +847,15 @@ if (authorityConfigured)
 
                         if (string.IsNullOrWhiteSpace(token))
                         {
+                            // No JWT token — check for gateway identity envelope (ReverseProxy passthrough)
+                            if (TryAuthenticateFromIdentityEnvelope(context.HttpContext, logger))
+                            {
+                                // Envelope authentication succeeded — skip JWT validation
+                                context.NoResult();
+                                context.Success();
+                                return Task.CompletedTask;
+                            }
+
                             logger.LogWarning("JWT token missing from request to {Path}", context.HttpContext.Request.Path);
                             return Task.CompletedTask;
                         }
@@ -3602,6 +3612,91 @@ static (Advisory Advisory, ImmutableArray<string> Aliases, string Fingerprint) C
     return (advisory, aliases, fingerprint);
 }
 
+/// <summary>
+/// Attempts to authenticate an HTTP request using the gateway's identity envelope headers.
+/// Used for ReverseProxy routes where the gateway strips the JWT Authorization header and
+/// attaches a signed identity envelope instead.
+/// </summary>
+static bool TryAuthenticateFromIdentityEnvelope(HttpContext httpContext, Microsoft.Extensions.Logging.ILogger logger)
+{
+    var headers = httpContext.Request.Headers;
+
+    if (!headers.TryGetValue("X-StellaOps-Identity-Envelope", out var envelopePayload) ||
+        !headers.TryGetValue("X-StellaOps-Identity-Envelope-Signature", out var envelopeSignature))
+    {
+        return false;
+    }
+
+    var signingKey = httpContext.RequestServices.GetService<IConfiguration>()
+        ?.GetValue<string>("STELLAOPS_IDENTITY_ENVELOPE_SIGNING_KEY")
+        ?? Environment.GetEnvironmentVariable("STELLAOPS_IDENTITY_ENVELOPE_SIGNING_KEY");
+
+    if (string.IsNullOrWhiteSpace(signingKey))
+    {
+        logger.LogWarning("Identity envelope received but signing key not configured");
+        return false;
+    }
+
+    if (!GatewayIdentityEnvelopeCodec.TryVerify(
+            envelopePayload.ToString(),
+            envelopeSignature.ToString(),
+            signingKey,
+            out var envelope) || envelope is null)
+    {
+        logger.LogWarning("Identity envelope signature verification failed for {Path}", httpContext.Request.Path);
+        return false;
+    }
+
+    var now = DateTimeOffset.UtcNow;
+    var skew = TimeSpan.FromMinutes(5);
+
+    if (envelope.IssuedAtUtc - skew > now || envelope.ExpiresAtUtc + skew < now)
+    {
+        logger.LogWarning("Identity envelope expired or not yet valid for {Path}", httpContext.Request.Path);
+        return false;
+    }
+
+    var claims = new List<Claim>
+    {
+        new(ClaimTypes.NameIdentifier, envelope.Subject),
+        new("sub", envelope.Subject)
+    };
+
+    if (!string.IsNullOrWhiteSpace(envelope.Tenant))
+    {
+        claims.Add(new Claim("stellaops:tenant", envelope.Tenant));
+        claims.Add(new Claim("tenant", envelope.Tenant));
+    }
+
+    if (!string.IsNullOrWhiteSpace(envelope.Project))
+    {
+        claims.Add(new Claim("stellaops:project", envelope.Project));
+        claims.Add(new Claim("project", envelope.Project));
+    }
+
+    foreach (var scope in envelope.Scopes.Where(s => !string.IsNullOrWhiteSpace(s)))
+    {
+        claims.Add(new Claim("scope", scope));
+    }
+
+    foreach (var role in envelope.Roles.Where(r => !string.IsNullOrWhiteSpace(r)))
+    {
+        claims.Add(new Claim(ClaimTypes.Role, role));
+    }
+
+    httpContext.User = new ClaimsPrincipal(
+        new ClaimsIdentity(
+            claims,
+            authenticationType: "StellaRouterEnvelope",
+            nameType: ClaimTypes.NameIdentifier,
+            roleType: ClaimTypes.Role));
+
+    logger.LogInformation("Authenticated via identity envelope for {Path}: subject={Subject} tenant={Tenant} scopes={Scopes}",
+        httpContext.Request.Path, envelope.Subject, envelope.Tenant, string.Join(' ', envelope.Scopes.Take(5)));
+
+    return true;
+}
+
 static ImmutableArray<string> BuildAliasQuery(Advisory advisory)
 {
     var set = new HashSet<string>(StringComparer.OrdinalIgnoreCase);

src/JobEngine/StellaOps.JobEngine/StellaOps.JobEngine.WebService/Program.cs

@@ -200,6 +200,7 @@ app.MapReleaseEndpoints();
 app.MapApprovalEndpoints();
 app.MapReleaseDashboardEndpoints();
 app.MapReleaseControlV2Endpoints();
+app.MapAuditEndpoints();
 
 // Refresh Router endpoint cache
 app.TryRefreshStellaRouterEndpoints(routerEnabled);

src/Web/StellaOps.Web/src/app/core/api/release-management.client.ts

@@ -379,17 +379,7 @@ export class ReleaseManagementHttpClient implements ReleaseManagementApi {
     }
 
     return this.http.get<RegistryImage[]>('/api/registry/images/search', { params: { q: query } }).pipe(
-      catchError(() =>
-        of([
-          {
-            name: `${query}-service`,
-            repository: `registry.internal/${query}-service`,
-            tags: ['latest'],
-            digests: [{ tag: 'latest', digest: `sha256:${query}1234567890abcdef`, pushedAt: new Date().toISOString() }],
-            lastPushed: new Date().toISOString(),
-          },
-        ]),
-      ),
+      catchError(() => of([])),
     );
   }
 
@@ -399,9 +389,9 @@ export class ReleaseManagementHttpClient implements ReleaseManagementApi {
         of({
           name: repository.split('/').at(-1) ?? repository,
           repository,
-          tags: ['latest'],
-          digests: [{ tag: 'latest', digest: 'sha256:mockdigest', pushedAt: new Date().toISOString() }],
-          lastPushed: new Date().toISOString(),
+          tags: [],
+          digests: [],
+          lastPushed: '',
         }),
       ),
     );