Report PostgreSQL collation drift in live smoke

docs/CODEX_EXECUTION_LOG.md

@@ -1627,3 +1627,30 @@ Limitations:
 
 Next recommended pass:
 - Run release readiness, rebuild/deploy Tower and verify browser/GIS/demo smoke again.
+
+## Sprint 36 PostgreSQL collation maintenance visibility (2026-06-17)
+
+Changed:
+- Added PostgreSQL database collation version reporting to `scripts/live_migration_smoke.sh`.
+- The live smoke now prints `COLLATION_VERSION_MISMATCH` with stored and actual versions when a reused PostGIS volume was created under an older libc/collation runtime.
+- The smoke also prints the exact `ALTER DATABASE "... " REFRESH COLLATION VERSION;` acknowledgement command, but does not run it automatically.
+- Documented the Unraid maintenance procedure and backup/index review guidance.
+- Added regression coverage for the collation reporting path.
+
+Tested:
+- `cd backend && python -m pytest tests/test_live_migration_smoke_script.py -q`
+- `bash -n scripts/live_migration_smoke.sh`
+- `python -m compileall backend/app`
+- `cd backend && python -m pytest -W error::DeprecationWarning`
+- `cd frontend && npm run typecheck`
+- `cd frontend && npm run build`
+- `bash scripts/run_readiness_check.sh`
+
+Open:
+- Run the updated smoke against Tower to confirm whether the reused volume still reports a collation mismatch.
+
+Limitations:
+- The smoke reports and documents the maintenance action. It intentionally does not mutate collation metadata automatically.
+
+Next recommended pass:
+- Run release readiness, deploy Tower and decide whether to manually acknowledge the current collation version.

docs/TODO.md

@@ -13,6 +13,7 @@ This file now starts with the current implementation status. Older preparation/b
 - [x] Add Unraid Compose template assets with editable ports, storage path and app icon.
 - [x] Add single-container Unraid runtime with embedded PostGIS, backend and frontend.
 - [x] Remove embedded PostGIS password defaults from all-in-one Docker image metadata.
+- [x] Report reused-volume PostgreSQL collation mismatches in live migration smoke.
 
 ## Current implementation status