feat: API docs for service api (#24425)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/fields/workflow_run_fields.py

@@ -1,4 +1,4 @@
-from flask_restx import fields
+from flask_restx import Api, Namespace, fields
 
 from fields.end_user_fields import simple_end_user_fields
 from fields.member_fields import simple_account_fields
@@ -17,6 +17,11 @@ workflow_run_for_log_fields = {
     "exceptions_count": fields.Integer,
 }
 
+
+def build_workflow_run_for_log_model(api_or_ns: Api | Namespace):
+    return api_or_ns.model("WorkflowRunForLog", workflow_run_for_log_fields)
+
+
 workflow_run_for_list_fields = {
     "id": fields.String,
     "version": fields.String,