Tests fixes, audit progress, UI completions

src/Attestor/__Libraries/StellaOps.Attestor.Oci/AGENTS.md

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+# Attestor OCI AGENTS
+
+## Purpose & Scope
+- Working directory: `src/Attestor/__Libraries/StellaOps.Attestor.Oci/`.
+- Roles: backend engineer, QA automation.
+- Focus: OCI reference parsing, ORAS/OCI referrer workflows, attestation attach/list/fetch/remove, and registry client contracts.
+
+## Required Reading (treat as read before DOING)
+- `docs/README.md`
+- `docs/07_HIGH_LEVEL_ARCHITECTURE.md`
+- `docs/modules/attestor/architecture.md`
+- `docs/modules/platform/architecture-overview.md`
+- Relevant sprint files.
+
+## Working Agreements
+- Follow OCI Distribution Spec 1.1 and DSSE envelope compatibility.
+- Keep digest/manifest generation deterministic and stable.
+- Avoid wall-clock time in outputs; prefer TimeProvider for timestamps.
+- Update `docs/implplan/SPRINT_*.md` and the local `TASKS.md` when starting or completing work.
+
+## Testing
+- Add unit tests under `src/Attestor/__Tests/StellaOps.Attestor.Oci.Tests/`.
+- Cover reference parsing, attach/list/fetch/remove, annotation behavior, and deterministic digests.

src/Attestor/__Libraries/StellaOps.Attestor.Oci/TASKS.md

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+# Attestor OCI Task Board
+
+This board mirrors active sprint tasks for this module.
+Source of truth: `docs/implplan/SPRINT_20251229_049_BE_csproj_audit_maint_tests.md`.
+
+| Task ID | Status | Notes |
+| --- | --- | --- |
+| AUDIT-0056-M | DONE | Maintainability audit for StellaOps.Attestor.Oci. |
+| AUDIT-0056-T | DONE | Test coverage audit for StellaOps.Attestor.Oci. |
+| AUDIT-0056-A | TODO | Pending approval for changes. |