Add unit tests for PackRunAttestation and SealedInstallEnforcer

- Implement comprehensive tests for PackRunAttestationService, covering attestation generation, verification, and event emission.
- Add tests for SealedInstallEnforcer to validate sealed install requirements and enforcement logic.
- Introduce a MonacoLoaderService stub for testing purposes to prevent Monaco workers/styles from loading during Karma runs.

docs/api/console/samples/console-export-events.ndjson

@@ -0,0 +1,14 @@
+event: started
+data: {"exportId":"console-export::tenant-default::2025-12-06::0007","status":"running","percent":0}
+
+event: progress
+data: {"exportId":"console-export::tenant-default::2025-12-06::0007","percent":25,"itemsCompleted":125,"itemsTotal":500}
+
+event: asset_ready
+data: {"exportId":"console-export::tenant-default::2025-12-06::0007","type":"advisory","id":"CVE-2024-12345","url":"https://exports.local/...","sha256":"cafe0001..."}
+
+event: progress
+data: {"exportId":"console-export::tenant-default::2025-12-06::0007","percent":75,"itemsCompleted":375,"itemsTotal":500}
+
+event: completed
+data: {"exportId":"console-export::tenant-default::2025-12-06::0007","status":"succeeded","manifestUrl":"https://exports.local/.../manifest.json"}