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.

docs/TASKS.md

@@ -15,6 +15,7 @@
 | DOCS-EVENTS-09-004 | DONE (2025-10-19) | Docs Guild, Scanner WebService | SCANNER-EVENTS-15-201 | Refresh scanner event docs to mirror DSSE-backed report fields, document `scanner.scan.completed`, and capture canonical sample validation. | Schemas updated for new payload shape; README references DSSE reuse and validation test; samples align with emitted events. |
 | PLATFORM-EVENTS-09-401 | DONE (2025-10-19) | Platform Events Guild | DOCS-EVENTS-09-003 | Embed canonical event samples into contract/integration tests and ensure CI validates payloads against published schemas. | Notify/Scheduler contract suites exercise samples; CI job validates samples with `ajv-cli`; Platform Events changelog notes coverage. |
 | RUNTIME-GUILD-09-402 | DONE (2025-10-19) | Runtime Guild | SCANNER-POLICY-09-107 | Confirm Scanner WebService surfaces `quietedFindingCount` and progress hints to runtime consumers; document readiness checklist. | Runtime verification run captures enriched payload; checklist/doc updates merged; stakeholders acknowledge availability. |
+| DOCS-CONCELIER-07-201 | TODO | Docs Guild, Concelier WebService | FEEDWEB-DOCS-01-001 | Final editorial review and publish pass for Concelier authority toggle documentation (Quickstart + operator guide). | Review feedback resolved, publish PR merged, release notes updated with documentation pointer. |
 | DOCS-RUNTIME-17-004 | TODO | Docs Guild, Runtime Guild | SCANNER-EMIT-17-701, ZASTAVA-OBS-17-005, DEVOPS-REL-17-002 | Document build-id workflows: SBOM exposure, runtime event payloads, debug-store layout, and operator guidance for symbol retrieval. | Architecture + operator docs updated with build-id sections, examples show `readelf` output + debuginfod usage, references linked from Offline Kit/Release guides. |
 
 > Update statuses (TODO/DOING/REVIEW/DONE/BLOCKED) as progress changes. Keep guides in sync with configuration samples under `etc/`.