fix(migrations): enforce schema ownership safety

server/server_start.sh

@@ -379,6 +379,9 @@ ensure_dependencies() {
 }
 
 run_database_migrations() {
+    info "Checking database migration state..."
+    PYTHONPATH="$SCRIPT_DIR/src${PYTHONPATH:+:$PYTHONPATH}" \
+        "$PYTHON_BIN" -m app.db.migration_preflight
     info "Applying database migrations..."
     "$PYTHON_BIN" -m alembic -c "$SCRIPT_DIR/alembic.ini" upgrade head
     info "Database migrations are up to date."