more audit work

src/AirGap/__Tests/StellaOps.AirGap.Sync.Tests/AGENTS.md

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+# AirGap Sync Tests Charter
+
+## Mission
+Validate air-gap sync services, merge behavior, and signing determinism.
+
+## Responsibilities
+- Maintain unit tests for AirGap.Sync services.
+- Keep fixtures deterministic and offline-friendly.
+- Track sprint tasks in `TASKS.md` and update the sprint tracker.
+
+## Key Paths
+- `AirGapBundleDsseSignerTests.cs`
+- `ConflictResolverTests.cs`
+- `HlcMergeServiceTests.cs`
+
+## Required Reading
+- `docs/modules/airgap/architecture.md`
+- `docs/modules/scheduler/architecture.md`
+- `docs/implplan/permament/SPRINT_20251229_049_BE_csproj_audit_maint_tests.md`
+
+## Working Agreement
+- 1. Use fixed time/IDs in tests; avoid Guid.NewGuid, DateTime.UtcNow.
+- 2. Keep determinism tests stable across platforms.
+- 3. Update `TASKS.md` and sprint statuses when work changes.

src/AirGap/__Tests/StellaOps.AirGap.Sync.Tests/TASKS.md

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+# AirGap Sync Tests Task Board
+
+This board mirrors active sprint tasks for this module.
+Source of truth: `docs/implplan/permament/SPRINT_20251229_049_BE_csproj_audit_maint_tests.md`.
+
+| Task ID | Status | Notes |
+| --- | --- | --- |
+| AUDIT-0793-M | DONE | Revalidated 2026-01-07. |
+| AUDIT-0793-T | DONE | Revalidated 2026-01-07. |
+| AUDIT-0793-A | DONE | Waived (test project; revalidated 2026-01-07). |