remove old import

app/database/schema_updates.py

@@ -6,10 +6,11 @@ already-initialized database. Safe to call multiple times.
 """
 from typing import Dict
 from sqlalchemy.engine import Engine
+from sqlalchemy import text
 
 
 def _existing_columns(conn, table: str) -> set[str]:
-    rows = conn.execute(f"PRAGMA table_info('{table}')").fetchall()
+    rows = conn.execute(text(f"PRAGMA table_info('{table}')")).fetchall()
     return {row[1] for row in rows}  # name is column 2
 
 
@@ -122,7 +123,7 @@ def ensure_schema_updates(engine: Engine) -> None:
             for col_name, col_type in cols.items():
                 if col_name not in existing:
                     try:
-                        conn.execute(f"ALTER TABLE {table} ADD COLUMN {col_name} {col_type}")
+                        conn.execute(text(f"ALTER TABLE {table} ADD COLUMN {col_name} {col_type}"))
                     except Exception:
                         # Ignore if not applicable (other engines) or race condition
                         pass