Remove three stale lint suppressions; say which DB the migrator manages

backend/app/core/migrations.py

@@ -1,4 +1,19 @@
-"""Lightweight schema sync for SQLite + one-shot migration helpers.
+"""Lightweight schema sync + one-shot migration helpers.
+
+THIS MANAGES THE PRODUCTION POSTGRES SCHEMA, not just SQLite. The header
+used to say "for SQLite", and every caveat below is still written in
+SQLite terms, which reads as though this were self-host-only machinery.
+It is not: ``app/main.py`` calls ``sync_schema(engine, Base.metadata)``
+unconditionally on every boot, against whatever engine is configured —
+Postgres on Fly, SQLite for a self-hosted install. There is no Alembic
+in this repo, so this module plus ``create_all`` IS the schema
+management for production.
+
+Two of the SQLite caveats below read differently on Postgres: adding a
+NOT NULL column without a default fails there too, but an ADD COLUMN
+with a non-volatile default is metadata-only and fast (PG11+), where
+SQLite rewrites. The "renames, type changes and drops need a real
+migration" caveat applies equally to both.
 
 Two kinds of function live here:
 

frontend/src/hooks/useMotionAlerts.jsx

@@ -133,6 +133,5 @@ export function useMotionAlerts(cameras) {
       abortRef.current?.abort()
     }
     // orgId: tear down + reconnect the stream under the new org's token.
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [getToken, showToast, orgId])
 }

frontend/src/hooks/useNotifications.jsx

@@ -213,7 +213,6 @@ export function useNotifications() {
       controller?.abort()
     }
     // orgId: tear down + reconnect the stream under the new org's token.
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [getToken, orgId])
 
   return {

frontend/src/pages/AdminPage.jsx

@@ -303,7 +303,6 @@ function AdminPage() {
       if (reader) reader.cancel().catch(() => {})
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [organization?.id, hasAdminFeature])
 
   const handleMcpFilterChange = (key, value) => {