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>

rag/svr/cache_file_svr.py

@@ -19,8 +19,8 @@ import traceback
 
 from api.db.db_models import close_connection
 from api.db.services.task_service import TaskService
-from rag.utils.storage_factory import STORAGE_IMPL
 from rag.utils.redis_conn import REDIS_CONN
+from common import settings
 
 
 def collect():
@@ -44,7 +44,7 @@ def main():
                     key = "{}/{}".format(kb_id, loc)
                     if REDIS_CONN.exist(key):
                         continue
-                    file_bin = STORAGE_IMPL.get(kb_id, loc)
+                    file_bin = settings.STORAGE_IMPL.get(kb_id, loc)
                     REDIS_CONN.transaction(key, file_bin, 12 * 60)
                     logging.info("CACHE: {}".format(loc))
                 except Exception as e: