Record the maintenance-script .env fix in the changelog

CHANGELOG.md

@@ -75,6 +75,18 @@ ADR-007 and ADR-002.
 
 ### Fixed
 
+- **A maintenance script could not find the database the site actually uses.**
+  `python scripts/export_catalog.py` on a deployed site died with 1045 "Access
+  denied for user 'root'@'localhost'", naming a user that site does not have.
+  Nothing loads `.env` for a plain script run: `wsgi.py` does it for the served
+  app and the `flask` CLI does it for itself, so both reach the real database,
+  while a bare `python scripts/...` gets neither and falls back to a hardcoded
+  `root@localhost` URL. The read-only failure is the harmless version - six of
+  the seven scripts write, and on a box where those fallback credentials happen
+  to resolve they would have silently rewritten the wrong database. All seven
+  now load `.env` from the repo root, resolved from the script's own location
+  rather than the working directory.
+
 - **A search result opened the list it sits in, not the record it found.** A
   NOTICE linked to `/notifications`, so clicking the row search had already
   identified sent the reader to the list page to find it again by hand. The id