fix(tests): ini reader 补 querySql 空值（PG reader 强读不带 fallback）

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/integration/datax/hive_import/app_user_cert_info.ini

@@ -15,6 +15,7 @@ table = public.app_user_cert_info
 column = id,user_id,cert_birthday,cert_sex,cert_province,cert_city,version,status,del_flag,create_time,update_time
 columnType =
 where = create_time >= '${start_date}' AND create_time < '${stop_date}'
+querySql =
 splitPk = id
 fetchSize = 1000