Move api.settings to common.settings (#11036)

### What problem does this PR solve?

As title

### Type of change

- [x] Refactoring

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

api/db/db_models.py

@@ -31,7 +31,7 @@ from peewee import InterfaceError, OperationalError, BigIntegerField, BooleanFie
 from playhouse.migrate import MySQLMigrator, PostgresqlMigrator, migrate
 from playhouse.pool import PooledMySQLDatabase, PooledPostgresqlDatabase
 
-from api import settings, utils
+from api import utils
 from api.db import SerializedType
 from api.utils.json_encode import json_dumps, json_loads
 from api.utils.configs import deserialize_b64, serialize_b64
@@ -39,6 +39,7 @@ from api.utils.configs import deserialize_b64, serialize_b64
 from common.time_utils import current_timestamp, timestamp_to_date, date_string_to_timestamp
 from common.decorator import singleton
 from common.constants import ParserType
+from common import settings
 
 
 CONTINUOUS_FIELD_TYPE = {IntegerField, FloatField, DateTimeField}