feat: Implement approvals workflow and notifications integration

- Added approvals orchestration with persistence and workflow scaffolding.
- Integrated notifications insights and staged resume hooks.
- Introduced approval coordinator and policy notification bridge with unit tests.
- Added approval decision API with resume requeue and persisted plan snapshots.
- Documented the Excitor consensus API beta and provided JSON sample payload.
- Created analyzers to flag usage of deprecated merge service APIs.
- Implemented logging for artifact uploads and approval decision service.
- Added tests for PackRunApprovalDecisionService and related components.

src/Cli/StellaOps.Cli/TASKS.md

@@ -49,6 +49,7 @@
 | CLI-POLICY-23-004 | TODO | DevEx/CLI Guild | WEB-POLICY-23-001 | Add `stella policy lint` command validating SPL files with compiler diagnostics; support JSON output. | Command returns lint diagnostics; exit codes documented; tests cover error scenarios. |
 | CLI-POLICY-23-005 | DOING (2025-10-28) | DevEx/CLI Guild | POLICY-GATEWAY-18-002..003, WEB-POLICY-23-002 | Implement `stella policy activate` with scheduling window, approval enforcement, and summary output. | Activation command integrates with API, handles 2-person rule failures; tests cover success/error. |
 > 2025-10-28: CLI command implemented with gateway integration (`policy activate`), interactive summary output, retry-aware metrics, and exit codes (0 success, 75 pending second approval). Tests cover success/pending/error paths.
+> 2025-11-06: Tightened required `--version` parsing, added scheduled activation handling coverage, and expanded tests to validate timestamp normalization.
 | CLI-POLICY-23-006 | TODO | DevEx/CLI Guild | WEB-POLICY-23-004 | Provide `stella policy history` and `stella policy explain` commands to pull run history and explanation trees. | Commands output JSON/table; integration tests with fixtures; docs updated. |
 
 ## Graph & Vuln Explorer v1