semi implemented and features implemented save checkpoint

docs/features/unchecked/evidencelocker/evidence-packets-for-every-decision.md

@@ -0,0 +1,30 @@
+# Evidence Packets for Every Decision
+
+## Module
+EvidenceLocker
+
+## Status
+IMPLEMENTED
+
+## Description
+Evidence bundles with manifests, attestations, and export capabilities are implemented for audit-grade decision records.
+
+## Implementation Details
+- **Modules**: `src/EvidenceLocker/StellaOps.EvidenceLocker/StellaOps.EvidenceLocker.Infrastructure/`, `src/EvidenceLocker/__Libraries/StellaOps.EvidenceLocker.Export/`
+- **Key Classes**:
+  - `EvidenceBundleBuilder` (`src/EvidenceLocker/StellaOps.EvidenceLocker/StellaOps.EvidenceLocker.Infrastructure/Builders/EvidenceBundleBuilder.cs`) - builds evidence bundles for decision records
+  - `EvidenceBundlePackagingService` (`src/EvidenceLocker/StellaOps.EvidenceLocker/StellaOps.EvidenceLocker.Infrastructure/Services/EvidenceBundlePackagingService.cs`) - packages evidence with attestations
+  - `EvidenceSignatureService` (`src/EvidenceLocker/StellaOps.EvidenceLocker/StellaOps.EvidenceLocker.Infrastructure/Signing/EvidenceSignatureService.cs`) - signs evidence bundles with DSSE
+  - `BundleManifest` (`src/EvidenceLocker/__Libraries/StellaOps.EvidenceLocker.Export/Models/BundleManifest.cs`) - manifest listing bundle contents and hashes
+  - `TarGzBundleExporter` (`src/EvidenceLocker/__Libraries/StellaOps.EvidenceLocker.Export/TarGzBundleExporter.cs`) - exports bundles as tar.gz archives
+  - `EvidenceBundleMetadata` (`src/EvidenceLocker/StellaOps.EvidenceLocker/StellaOps.EvidenceLocker.Core/Domain/EvidenceBundleMetadata.cs`) - metadata for each decision's evidence packet
+- **Interfaces**: `IEvidenceBundleBuilder`, `IEvidenceSignatureService`, `IEvidenceBundleExporter`
+- **Source**: Feature matrix scan
+
+## E2E Test Plan
+- [ ] Record a release decision and verify `EvidenceBundleBuilder` creates an evidence packet with the decision context
+- [ ] Verify `BundleManifest` lists all evidence items with their content-addressed hashes
+- [ ] Verify `EvidenceSignatureService` signs the evidence packet and the signature is verifiable
+- [ ] Export the decision evidence packet via `TarGzBundleExporter` and verify the archive is complete
+- [ ] Verify every decision type (promote, block, rollback, override) generates a corresponding evidence packet
+- [ ] Verify evidence packets are immutable: attempting to modify after creation fails