Feat: rename file to avoid package name conflict (infiniflow#10863)

### What problem does this PR solve?

Feat: rename file to avoid package name conflict

### Type of change

- [x] Refactoring

Author: Magicbook1108

api/apps/__init__.py

@@ -27,7 +27,7 @@
 from api.db import StatusEnum
 from api.db.db_models import close_connection
 from api.db.services import UserService
-from api.utils.json import CustomJSONEncoder
+from api.utils.json_encode import CustomJSONEncoder
 from api.utils import commands
 
 from flask_mail import Mail

api/db/db_models.py

@@ -32,7 +32,7 @@
 
 from api import settings, utils
 from api.db import ParserType, SerializedType
-from api.utils.json import json_dumps, json_loads
+from api.utils.json_encode import json_dumps, json_loads
 from api.utils.configs import deserialize_b64, serialize_b64
 
 from common.time_utils import current_timestamp, timestamp_to_date, date_string_to_timestamp

api/utils/api_utils.py

@@ -51,7 +51,7 @@
 from api.constants import REQUEST_MAX_WAIT_SEC, REQUEST_WAIT_SEC
 from api.db import ActiveEnum
 from api.db.db_models import APIToken
-from api.utils.json import CustomJSONEncoder, json_dumps
+from api.utils.json_encode import CustomJSONEncoder, json_dumps
 from api.utils import get_uuid
 from rag.utils.mcp_tool_call_conn import MCPToolCallSession, close_multiple_mcp_toolcall_sessions