semi implemented and features implemented save checkpoint

docs/features/unchecked/airgap/time-anchoring-for-offline-environments.md

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+# Time Anchoring for Offline Environments
+
+## Module
+AirGap
+
+## Status
+IMPLEMENTED
+
+## Description
+Time anchoring module with anchor loader, token parser, staleness calculator, and sealed startup validation for air-gapped environments. Includes HLC (Hybrid Logical Clock) merge services for multi-node sync.
+
+## Implementation Details
+- **Time module**: `src/AirGap/StellaOps.AirGap.Time/` -- dedicated time anchoring service
+- **Controllers**: `src/AirGap/StellaOps.AirGap.Time/Controllers/` -- time anchor API controllers
+- **Services**: `src/AirGap/StellaOps.AirGap.Time/Services/` -- HLC merge, staleness calculation, anchor loading
+- **Parsing**: `src/AirGap/StellaOps.AirGap.Time/Parsing/` -- time anchor token parsing
+- **Models**: `src/AirGap/StellaOps.AirGap.Time/Models/` -- time anchor data models
+- **Stores**: `src/AirGap/StellaOps.AirGap.Time/Stores/` -- time anchor state stores
+- **Config**: `src/AirGap/StellaOps.AirGap.Time/Config/` -- time anchor configuration
+- **Hooks**: `src/AirGap/StellaOps.AirGap.Time/Hooks/` -- time-related event hooks
+- **Health**: `src/AirGap/StellaOps.AirGap.Time/Health/` -- time health checks
+- **Fixtures**: `src/AirGap/StellaOps.AirGap.Time/fixtures/` -- deterministic time test data
+- **Tests**: `src/AirGap/__Tests/StellaOps.AirGap.Time.Tests/`
+- **Attestor timestamping**: `src/Attestor/__Libraries/StellaOps.Attestor.Timestamping/TimeCorrelationValidator.Validate.cs`, `TimeCorrelationStatus.cs`
+- **Source**: Feature matrix scan
+
+## E2E Test Plan
+- [ ] Verify time anchor loading from sealed bundles
+- [ ] Test token parsing extracts correct anchor timestamps
+- [ ] Test staleness calculator produces correct durations
+- [ ] Verify HLC merge service handles multi-node sync correctly
+- [ ] Test health checks report time anchor status