feat: add Reachability Center and Why Drawer components with tests

- Implemented ReachabilityCenterComponent for displaying asset reachability status with summary and filtering options.
- Added ReachabilityWhyDrawerComponent to show detailed reachability evidence and call paths.
- Created unit tests for both components to ensure functionality and correctness.
- Updated accessibility test results for the new components.

docs/api/gateway/samples/orchestrator-deadletter-replay.json

@@ -0,0 +1,24 @@
+{
+  "success": true,
+  "newJobId": "dddddddd-dddd-dddd-dddd-dddddddddddd",
+  "errorMessage": null,
+  "updatedEntry": {
+    "entryId": "eeeeeeee-eeee-eeee-eeee-eeeeeeeeeeee",
+    "originalJobId": "ffffffff-ffff-ffff-ffff-ffffffffffff",
+    "runId": null,
+    "sourceId": null,
+    "jobType": "export",
+    "status": "Replayed",
+    "errorCode": "quota_exceeded",
+    "failureReason": "Quota exceeded for job type export.",
+    "remediationHint": "Increase quota or retry later.",
+    "category": "quota_exceeded",
+    "isRetryable": true,
+    "canReplay": false,
+    "failedAt": "2025-12-10T00:00:00Z",
+    "createdAt": "2025-12-10T00:00:00Z",
+    "expiresAt": "2026-01-10T00:00:00Z",
+    "resolvedAt": null
+  },
+  "traceId": "trace-sample"
+}