semi implemented and features implemented save checkpoint

docs/features/unchecked/taskrunner/pack-run-approval-gates.md

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+# Pack Run Approval Gates
+
+## Module
+TaskRunner
+
+## Status
+IMPLEMENTED
+
+## Description
+Approval gate system for task packs with coordinator, decision service, state tracking, and gate state updating.
+
+## Implementation Details
+- **Approval coordinator**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Execution/PackRunApprovalCoordinator.cs` -- orchestrates approval gate flow
+- **Approval state**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Execution/PackRunApprovalState.cs` -- approval state tracking model
+- **Approval status**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Execution/PackRunApprovalStatus.cs` -- approval status enum
+- **Approval store interface**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Execution/IPackRunApprovalStore.cs` -- approval persistence contract
+- **Gate state updater**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Execution/PackRunGateStateUpdater.cs` -- updates gate states during execution
+- **Decision service**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Infrastructure/Execution/PackRunApprovalDecisionService.cs` -- processes approval decisions
+- **File-based store**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Infrastructure/Execution/FilePackRunApprovalStore.cs` -- file-backed approval persistence
+- **Postgres store**: `src/TaskRunner/__Libraries/StellaOps.TaskRunner.Persistence/Postgres/Repositories/PostgresPackRunApprovalStore.cs` -- PostgreSQL approval persistence
+- **Tests**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Tests/PackRunApprovalCoordinatorTests.cs`, `PackRunApprovalDecisionServiceTests.cs`, `PackRunGateStateUpdaterTests.cs`
+- **Source**: Feature matrix scan
+
+## E2E Test Plan
+- [ ] Verify approval gates block execution until approved
+- [ ] Test approval coordinator handles multi-approver gates
+- [ ] Verify gate state transitions (pending -> approved/rejected)
+- [ ] Test approval persistence survives service restart
+- [ ] Verify rejected gates prevent pack run continuation