feat: API docs for service api (#24425)

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

api/fields/message_fields.py

@@ -1,11 +1,19 @@
-from flask_restx import fields
+from flask_restx import Api, Namespace, fields
 
 from fields.conversation_fields import message_file_fields
 from libs.helper import TimestampField
 
 from .raws import FilesContainedField
 
-feedback_fields = {"rating": fields.String}
+feedback_fields = {
+    "rating": fields.String,
+}
+
+
+def build_feedback_model(api_or_ns: Api | Namespace):
+    """Build the feedback model for the API or Namespace."""
+    return api_or_ns.model("Feedback", feedback_fields)
+
 
 agent_thought_fields = {
     "id": fields.String,
@@ -21,6 +29,12 @@ agent_thought_fields = {
     "files": fields.List(fields.String),
 }
 
+
+def build_agent_thought_model(api_or_ns: Api | Namespace):
+    """Build the agent thought model for the API or Namespace."""
+    return api_or_ns.model("AgentThought", agent_thought_fields)
+
+
 retriever_resource_fields = {
     "id": fields.String,
     "message_id": fields.String,