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/advisory-ai-start-job.json

@@ -0,0 +1,14 @@
+{
+  "profile": "standard",
+  "prompt": "<redacted>",
+  "maxTokens": 2048,
+  "dryRun": false,
+  "context": {
+    "sbomDigests": [
+      "sha256:6c81f2bbd8bd7336f197f3f68fba2f76d7287dd1a5e2a0f0e9f14f23f3c2f917"
+    ],
+    "vulnIds": ["CVE-2021-44228"],
+    "purls": ["pkg:maven/org.apache.logging.log4j/log4j-core@2.14.1"]
+  }
+}
+