Fix transaction context manager to re-raise exceptions after rollback

The except block was swallowing exceptions silently after rolling back
the transaction. Added `raise` to propagate the exception to the caller.

Co-authored-by: Cursor <cursoragent@cursor.com>

records.py

@@ -343,6 +343,7 @@ class Database(object):
             tx.commit()
         except:
             tx.rollback()
+            raise
         finally:
             conn.close()