Move some constants to common (#11004)

### What problem does this PR solve?

As title.

### Type of change

- [x] Refactoring

---------

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

api/db/services/connector_service.py

@@ -19,12 +19,13 @@ from datetime import datetime
 from anthropic import BaseModel
 from peewee import SQL, fn
 
-from api.db import InputType, TaskStatus
+from api.db import InputType
 from api.db.db_models import Connector, SyncLogs, Connector2Kb, Knowledgebase
 from api.db.services.common_service import CommonService
 from api.db.services.document_service import DocumentService
 from api.db.services.file_service import FileService
 from common.misc_utils import get_uuid
+from common.constants import TaskStatus
 from common.time_utils import current_timestamp, timestamp_to_date