Add tests and implement StubBearer authentication for Signer endpoints

- Created SignerEndpointsTests to validate the SignDsse and VerifyReferrers endpoints.
- Implemented StubBearerAuthenticationDefaults and StubBearerAuthenticationHandler for token-based authentication.
- Developed ConcelierExporterClient for managing Trivy DB settings and export operations.
- Added TrivyDbSettingsPageComponent for UI interactions with Trivy DB settings, including form handling and export triggering.
- Implemented styles and HTML structure for Trivy DB settings page.
- Created NotifySmokeCheck tool for validating Redis event streams and Notify deliveries.

deploy/README.md

@@ -17,4 +17,21 @@ This directory contains deterministic deployment bundles for the core Stella Ops
 3. Run `deploy/tools/validate-profiles.sh` (requires Docker CLI and Helm) to ensure the bundles lint and template cleanly.
 4. Commit the change alongside any documentation updates (e.g. install guide cross-links).
 
-Maintaining the digest linkage keeps offline/air-gapped installs reproducible and avoids tag drift between environments.
+Maintaining the digest linkage keeps offline/air-gapped installs reproducible and avoids tag drift between environments.
+
+## CI smoke checks
+
+The `.gitea/workflows/build-test-deploy.yml` pipeline includes a `notify-smoke` stage that validates scanner event propagation after staging deployments. Configure the following repository secrets (or environment-level secrets) so the job can connect to Redis and the Notify API:
+
+- `NOTIFY_SMOKE_REDIS_DSN` – Redis connection string (`redis://user:pass@host:port/db`).
+- `NOTIFY_SMOKE_NOTIFY_BASEURL` – Base URL for the staging Notify WebService (e.g. `https://notify.stage.stella-ops.internal`).
+- `NOTIFY_SMOKE_NOTIFY_TOKEN` – OAuth bearer token (service account) with permission to read deliveries.
+- `NOTIFY_SMOKE_NOTIFY_TENANT` – Tenant identifier used for the smoke validation requests.
+- *(Optional)* `NOTIFY_SMOKE_NOTIFY_TENANT_HEADER` – Override for the tenant header name (defaults to `X-StellaOps-Tenant`).
+
+Define the following repository variables (or secrets) to drive the assertions performed by the smoke check:
+
+- `NOTIFY_SMOKE_EXPECT_KINDS` – Comma-separated event kinds the checker must observe (for example `scanner.report.ready,scanner.scan.completed`).
+- `NOTIFY_SMOKE_LOOKBACK_MINUTES` – Time window (in minutes) used when scanning the Redis stream for recent events (for example `30`).
+
+All of the above values are required—the workflow fails fast with a descriptive error if any are missing or empty. Provide the variables at the organisation or repository scope before enabling the smoke stage.