more audit work

src/__Libraries/StellaOps.Provcache.Postgres/AGENTS.md

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+# Provcache Postgres Library Charter
+
+## Mission
+- Provide deterministic PostgreSQL persistence for Provcache entries, evidence chunks, and revocations.
+
+## Responsibilities
+- Keep EF Core mappings stable and schema-compatible.
+- Use injected TimeProvider/IGuidProvider for deterministic timestamps and IDs.
+- Validate inputs and propagate CancellationToken through database operations.
+
+## Required Reading
+- docs/modules/prov-cache/architecture.md
+- docs/modules/platform/architecture-overview.md
+
+## Working Directory & Scope
+- Primary: src/__Libraries/StellaOps.Provcache.Postgres
+
+## Testing Expectations
+- Add repository tests for upsert/delete/metrics and evidence chunk storage.
+- Validate DbContext mappings and indexes with migrations or EF Core tests.
+
+## Working Agreement
+- Update sprint status in docs/implplan/SPRINT_*.md and local TASKS.md.
+- Keep outputs deterministic and ASCII-only in comments/logs.

src/__Libraries/StellaOps.Provcache.Postgres/TASKS.md

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+# Provcache Postgres 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-0099-M | DONE | Revalidated 2026-01-08; maintainability audit for Provcache.Postgres. |
+| AUDIT-0099-T | DONE | Revalidated 2026-01-08; test coverage audit for Provcache.Postgres. |
+| AUDIT-0099-A | TODO | Pending approval (revalidated 2026-01-08). |