fix predicted vote db insert

recommender/scripts/predict_media_votes.py

@@ -1,3 +1,5 @@
+from sqlalchemy import text
+
 from database import get_db_connection, get_all_user_ids
 from predict import predict_votes
 
@@ -9,7 +11,7 @@
     p_media = predict_votes(conn, user_id)
 
     for idx, row in p_media.iterrows():
-        conn.execute(
+        conn.execute(text(
             'insert into media_user_vote_prediction ('
             'media_id, user_id, predicted_vote, created_at, updated_at'
             ') values ('
@@ -22,4 +24,4 @@
                 'user_id': user_id,
                 'predicted_vote': row['vote_type'],
             }
-        )
+        ))