B-core-3 (2026-08-17 review): decouple two things from router modules.
1. Feed read-model → new app/feedquery.py: the pure query-building and
row-serialization layer (feed_columns, serialize, _filtered_query,
to_tsquery_str, and the keyset-pagination helpers) moves out of
routes/feed.py, which keeps only the route handlers, _feed_params, and
the request models. The three external consumers (playlists, search,
plex/browse) now import from app.feedquery instead of reaching into the
feed router.
2. admin_user sweep: 7 modules imported admin_user via app.routes.admin
(an incidental re-export of app.auth.admin_user). Repoint them all to
the definition in app.auth (audit, channels, config, quota, scheduler,
plex/admin, plex/browse); routes.admin keeps its own import for its use.
Pure code motion — no behaviour change. Full DB-lane suite 287 passed /
2 skipped; ruff clean.
peter
5f09259bbf