semi implemented and features implemented save checkpoint

docs/features/unchecked/cli/cli-forensic-snapshot-commands.md

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+# CLI Forensic Snapshot Commands
+
+## Module
+Cli
+
+## Status
+IMPLEMENTED
+
+## Description
+CLI commands for creating, listing, and showing forensic snapshots with DSSE verification and timeline validation, enabling incident response workflows from the command line.
+
+## Implementation Details
+- **Command Handlers**: `src/Cli/StellaOps.Cli/Commands/CommandHandlers.cs` -- partial class with forensic snapshot handlers
+- **Forensic Services**: `src/Cli/StellaOps.Cli/Services/ForensicSnapshotClient.cs` / `IForensicSnapshotClient.cs` -- API client for forensic snapshot operations
+- **Forensic Verifier**: `src/Cli/StellaOps.Cli/Services/ForensicVerifier.cs` / `IForensicVerifier.cs` -- DSSE verification for forensic snapshots
+- **Sprint**: SPRINT_0201_0001_0001_cli_i
+- **Commands**:
+  - `stella forensic create --digest <digest> --reason <reason>` -- create a forensic snapshot for an artifact
+  - `stella forensic list` -- list forensic snapshots with status and timestamps
+  - `stella forensic show <snapshot-id>` -- show snapshot details including evidence, timeline
+  - `stella forensic verify <snapshot-id>` -- verify DSSE signature and timeline integrity
+- **DSSE Integration**: Snapshots are DSSE-signed for tamper-evidence
+
+## E2E Test Plan
+- [ ] Run `stella forensic create --digest sha256:abc123 --reason "Incident investigation"` and verify snapshot created
+- [ ] Run `stella forensic list` and verify snapshots listed with ID, digest, reason, timestamp
+- [ ] Run `stella forensic show <id>` and verify detailed snapshot with evidence links and timeline
+- [ ] Run `stella forensic verify <id>` and verify DSSE signature validation passes
+- [ ] Verify timeline validation detects gaps or ordering violations
+- [ ] Verify `--format json` provides structured output
+- [ ] Verify error handling for non-existent snapshot IDs