Annotation management (#1767)

Co-authored-by: jyong <jyong@dify.ai>

api/fields/annotation_fields.py

@@ -0,0 +1,36 @@
+from flask_restful import fields
+from libs.helper import TimestampField
+
+account_fields = {
+    'id': fields.String,
+    'name': fields.String,
+    'email': fields.String
+}
+
+
+annotation_fields = {
+    "id": fields.String,
+    "question": fields.String,
+    "answer": fields.Raw(attribute='content'),
+    "hit_count": fields.Integer,
+    "created_at": TimestampField,
+    # 'account': fields.Nested(account_fields, allow_null=True)
+}
+
+annotation_list_fields = {
+    "data": fields.List(fields.Nested(annotation_fields)),
+}
+
+annotation_hit_history_fields = {
+    "id": fields.String,
+    "source": fields.String,
+    "score": fields.Float,
+    "question": fields.String,
+    "created_at": TimestampField,
+    "match": fields.String(attribute='annotation_question'),
+    "response": fields.String(attribute='annotation_content')
+}
+
+annotation_hit_history_list_fields = {
+    "data": fields.List(fields.Nested(annotation_hit_history_fields)),
+}