qa(exportcenter): close local evidence cache feature and start oci digest checks

docs/features/unchecked/exportcenter/local-evidence-cache-with-deferred-enrichment-queue.md

@@ -1,25 +0,0 @@
-# Local Evidence Cache with Deferred Enrichment Queue
-
-## Module
-ExportCenter
-
-## Status
-IMPLEMENTED
-
-## Description
-Disk-backed local evidence cache that stores scan artifacts (SBOM, VEX, reachability data) alongside findings with a deferred enrichment queue pattern for offline-first evidence collection and lazy hydration.
-
-## Implementation Details
-- **Cache service interface**: `src/ExportCenter/StellaOps.ExportCenter/StellaOps.ExportCenter.Core/EvidenceCache/IEvidenceCacheService.cs` -- evidence cache contract
-- **Cache service implementation**: `src/ExportCenter/StellaOps.ExportCenter/StellaOps.ExportCenter.Core/EvidenceCache/LocalEvidenceCacheService.cs` -- disk-backed local evidence cache with deferred enrichment queue
-- **Cache models**: `src/ExportCenter/StellaOps.ExportCenter/StellaOps.ExportCenter.Core/EvidenceCache/CacheModels.cs` -- cache entry models for SBOM, VEX, reachability data
-- **Cache manifest**: `src/ExportCenter/StellaOps.ExportCenter/StellaOps.ExportCenter.Core/EvidenceCache/CacheManifest.cs` -- cache manifest for inventory tracking
-- **Tests**: `src/ExportCenter/StellaOps.ExportCenter/StellaOps.ExportCenter.Tests/EvidenceCache/LocalEvidenceCacheServiceTests.cs`
-- **Source**: SPRINT_3605_0001_0001_local_evidence_cache.md
-
-## E2E Test Plan
-- [ ] Verify evidence cache stores SBOM, VEX, and reachability data to disk
-- [ ] Test deferred enrichment queue processes entries lazily
-- [ ] Verify cache manifest tracks all cached entries
-- [ ] Test offline-first behavior (cache works without network)
-- [ ] Verify cache eviction policy for disk space management