feat: Implement approvals workflow and notifications integration

- Added approvals orchestration with persistence and workflow scaffolding.
- Integrated notifications insights and staged resume hooks.
- Introduced approval coordinator and policy notification bridge with unit tests.
- Added approval decision API with resume requeue and persisted plan snapshots.
- Documented the Excitor consensus API beta and provided JSON sample payload.
- Created analyzers to flag usage of deprecated merge service APIs.
- Implemented logging for artifact uploads and approval decision service.
- Added tests for PackRunApprovalDecisionService and related components.

src/Cli/__Tests/StellaOps.Cli.Tests/Commands/CommandHandlersTests.cs

@@ -1811,11 +1811,11 @@ spec:
     }
 
     [Fact]
-    public async Task HandlePolicyActivateAsync_PendingSecondApprovalSetsExitCode()
-    {
-        var originalExit = Environment.ExitCode;
-
-        var backend = new StubBackendClient(new JobTriggerResult(true, "ok", null, null));
+    public async Task HandlePolicyActivateAsync_PendingSecondApprovalSetsExitCode()
+    {
+        var originalExit = Environment.ExitCode;
+
+        var backend = new StubBackendClient(new JobTriggerResult(true, "ok", null, null));
         backend.ActivationResult = new PolicyActivationResult(
             "pending_second_approval",
             new PolicyActivationRevision(
@@ -1852,15 +1852,65 @@ spec:
         finally
         {
             Environment.ExitCode = originalExit;
-        }
-    }
-
-    [Fact]
-    public async Task HandlePolicyActivateAsync_MapsErrorCodes()
-    {
-        var originalExit = Environment.ExitCode;
-
-        var backend = new StubBackendClient(new JobTriggerResult(true, "ok", null, null))
+        }
+    }
+
+    [Fact]
+    public async Task HandlePolicyActivateAsync_ParsesScheduledTimestamp()
+    {
+        var originalExit = Environment.ExitCode;
+        var backend = new StubBackendClient(new JobTriggerResult(true, "ok", null, null));
+        backend.ActivationResult = new PolicyActivationResult(
+            "scheduled",
+            new PolicyActivationRevision(
+                "P-8",
+                5,
+                "approved",
+                false,
+                DateTimeOffset.Parse("2025-12-01T00:30:00Z", CultureInfo.InvariantCulture),
+                null,
+                new ReadOnlyCollection<PolicyActivationApproval>(Array.Empty<PolicyActivationApproval>())));
+
+        var provider = BuildServiceProvider(backend);
+
+        try
+        {
+            const string scheduledValue = "2025-12-01T03:00:00+02:00";
+            await CommandHandlers.HandlePolicyActivateAsync(
+                provider,
+                policyId: "P-8",
+                version: 5,
+                note: null,
+                runNow: false,
+                scheduledAt: scheduledValue,
+                priority: null,
+                rollback: false,
+                incidentId: null,
+                verbose: false,
+                cancellationToken: CancellationToken.None);
+
+            Assert.Equal(0, Environment.ExitCode);
+            Assert.NotNull(backend.LastPolicyActivation);
+            var activation = backend.LastPolicyActivation!.Value;
+            Assert.False(activation.Request.RunNow);
+            var expected = DateTimeOffset.Parse(
+                scheduledValue,
+                CultureInfo.InvariantCulture,
+                DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal);
+            Assert.Equal(expected, activation.Request.ScheduledAt);
+        }
+        finally
+        {
+            Environment.ExitCode = originalExit;
+        }
+    }
+
+    [Fact]
+    public async Task HandlePolicyActivateAsync_MapsErrorCodes()
+    {
+        var originalExit = Environment.ExitCode;
+
+        var backend = new StubBackendClient(new JobTriggerResult(true, "ok", null, null))
         {
             ActivationException = new PolicyApiException("Revision not approved", HttpStatusCode.BadRequest, "ERR_POL_002")
         };