Fix: osm_poi_edits Migration — conn.execute() nur eine Statement gleichzeitig

backend/database.py

@@ -1191,9 +1191,11 @@ def _migrate(conn_factory):
                 mod_id      INTEGER REFERENCES users(id),
                 created_at  TEXT    NOT NULL DEFAULT (datetime('now')),
                 resolved_at TEXT
-            );
+            )
+        """)
+        conn.execute("""
             CREATE INDEX IF NOT EXISTS idx_osm_poi_edits_status
-                ON osm_poi_edits(status, created_at DESC);
+                ON osm_poi_edits(status, created_at DESC)
         """)
         logger.info("Migration: osm_poi_edits Tabelle bereit.")