Fix PostgreSQL init_db: rollback after benign schema migration errors.

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

app.py

@@ -56,7 +56,7 @@ from kline_store import ensure_kline_tables
 from kline_stream import kline_hub, sse_format
 from kline_chart import generate_review_kline_chart, fetch_market_klines, MARKET_PERIODS
 from market import get_price as market_get_price, set_ths_refresh_token, get_quote_source_label
-from db_conn import OperationalError, connect_db, database_label, is_benign_migration_error, is_db_contention_error
+from db_conn import OperationalError, connect_db, database_label, is_benign_migration_error, is_db_contention_error, is_schema_migration_error, rollback_if_postgres
 from admin_settings import save_admin_credentials
 from db_backup import (
     backup_dir,
@@ -373,8 +373,9 @@ def init_db():
         try:
             c.execute(sql)
         except Exception as exc:
-            if not is_benign_migration_error(exc):
+            if not is_schema_migration_error(exc):
                 raise
+            rollback_if_postgres(conn)
     c.execute('''CREATE TABLE IF NOT EXISTS review_records
                  (id INTEGER PRIMARY KEY AUTOINCREMENT,
                   open_time TEXT, close_time TEXT,
@@ -427,8 +428,9 @@ def init_db():
         try:
             c.execute(sql)
         except Exception as exc:
-            if not is_benign_migration_error(exc):
+            if not is_schema_migration_error(exc):
                 raise
+            rollback_if_postgres(conn)
     ensure_kline_tables(conn)
     init_strategy_tables(conn)
     from risk.account_risk_lib import ensure_account_risk_schema