Add MergeUsageAnalyzer to detect legacy merge service usage

- Implemented MergeUsageAnalyzer to flag usage of AdvisoryMergeService and AddMergeModule.
- Created AnalyzerReleases.Shipped.md and AnalyzerReleases.Unshipped.md for release documentation.
- Added tests for MergeUsageAnalyzer to ensure correct diagnostics for various scenarios.
- Updated project files for analyzers and tests to include necessary dependencies and configurations.
- Introduced a sample report structure for scanner output.

docs/implplan/SPRINTS.md

@@ -14,8 +14,7 @@ Follow the sprint files below in order. Update task status in both `SPRINTS` and
 - [Ops & Offline](./SPRINT_190_ops_offline.md)
 - [Documentation & Process](./SPRINT_200_documentation_process.md)
 
-<<<<<<< Updated upstream
-> 2025-11-03: ATTESTOR-72-003 moved to DOING (Attestor Service Guild) – running live TTL validation against local MongoDB/Redis processes (manual hosts, no Docker).
+> 2025-11-03: ATTESTOR-72-003 moved to DOING (Attestor Service Guild) – running live TTL validation against local MongoDB/Redis processes (manual hosts, no Docker).
 > 2025-11-03: ATTESTOR-72-003 marked DONE (Attestor Service Guild) – Mongo/Redis TTL expiry logs archived under `docs/modules/attestor/evidence/2025-11-03-*.txt` with summary in `docs/modules/attestor/ttl-validation.md`.
 > 2025-11-03: AIAI-31-004B moved to DOING (Advisory AI Guild) – starting prompt assembler/guardrail plumbing, cache persistence contract, and DSSE provenance wiring.
 > 2025-11-03: PLG7.RFC marked DONE (Auth Plugin Guild, Security Guild) – LDAP plugin RFC accepted; review log stored at `docs/notes/2025-11-03-authority-plugin-ldap-review.md`, follow-up PLG7.IMPL-001..005 queued.