feat: Add an asynchronous repository to improve workflow performance (#20050)

Co-authored-by: liangxin <liangxin@shein.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: liangxin <xinlmain@gmail.com>

api/core/workflow/workflow_type_encoder.py

@@ -1,4 +1,5 @@
 from collections.abc import Mapping
+from decimal import Decimal
 from typing import Any
 
 from pydantic import BaseModel
@@ -17,6 +18,9 @@ class WorkflowRuntimeTypeConverter:
             return value
         if isinstance(value, (bool, int, str, float)):
             return value
+        if isinstance(value, Decimal):
+            # Convert Decimal to float for JSON serialization
+            return float(value)
         if isinstance(value, Segment):
             return self._to_json_encodable_recursive(value.value)
         if isinstance(value, File):