more features checks. setup improvements

docs/features/unimplemented/integrations/registry-webhook-handlers.md

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+# Registry Webhook Handlers (Docker/Harbor)
+
+## Module
+Integrations
+
+## Status
+NOT_IMPLEMENTED
+
+## Description
+Webhook handlers for Docker Registry v2 and Harbor image-push events that trigger async gate evaluation. Accepts webhook payloads at `/api/v1/webhooks/registry/*` and queues gate evaluation jobs via an in-memory Channel-based queue with a background worker.
+
+## Implementation Details
+- **API endpoints**: `src/Integrations/StellaOps.Integrations.WebService/IntegrationEndpoints.cs` -- webhook receiver at `/api/v1/webhooks/registry/*`
+- **Integration service**: `src/Integrations/StellaOps.Integrations.WebService/IntegrationService.cs` -- processes webhook payloads and queues gate evaluation
+- **Harbor plugin**: `src/Integrations/__Plugins/StellaOps.Integrations.Plugin.Harbor/HarborConnectorPlugin.cs` -- Harbor-specific webhook handling
+- **GitHub App plugin**: `src/Integrations/__Plugins/StellaOps.Integrations.Plugin.GitHubApp/GitHubAppConnectorPlugin.cs` -- GitHub webhook processing
+- **Integration DTOs**: `src/Integrations/__Libraries/StellaOps.Integrations.Contracts/IntegrationDtos.cs` -- webhook payload models
+- **WebService program**: `src/Integrations/StellaOps.Integrations.WebService/Program.cs` -- webhook endpoint registration
+- **Source**: SPRINT_20251226_001_BE_cicd_gate_integration.md
+
+## E2E Test Plan
+- [ ] Verify Docker Registry v2 webhook payloads are accepted
+- [ ] Test Harbor image-push webhook triggers gate evaluation
+- [ ] Verify Channel-based queue processes jobs asynchronously
+- [ ] Test webhook authentication validates payload signatures
+- [ ] Verify gate evaluation job queuing under load