WIP-CHECKPOINT[auth-refactor]: 固化工程师崩溃前部分成果 + 同树其他未提交WIP（仅源码，不含密钥/二进制）-- 待重激活工程师续作

backend/app/schemas/conversation_annotation.py

@@ -0,0 +1,46 @@
+# =============================================================================
+# 企微IT智能服务台 — 会话标注 Pydantic Schema
+# =============================================================================
+
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+
+# --------------------------------------------------------------------------
+# 创建会话标注 Schema
+# --------------------------------------------------------------------------
+class AnnotationCreate(BaseModel):
+    """创建会话标注请求 Schema。"""
+
+    conversation_id: str = Field(..., description="会话ID")
+    message_id: str = Field(..., description="被标注的消息ID")
+    feedback: str = Field(..., description="useful=有用/useless=无用")
+    comment: Optional[str] = Field(None, description="备注")
+
+
+# --------------------------------------------------------------------------
+# 会话标注响应 Schema
+# --------------------------------------------------------------------------
+class AnnotationResponse(BaseModel):
+    """会话标注响应 Schema。"""
+
+    id: str
+    conversation_id: str
+    agent_id: str
+    message_id: str
+    feedback: str
+    comment: Optional[str] = None
+    created_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+# --------------------------------------------------------------------------
+# 会话标注列表响应 Schema
+# --------------------------------------------------------------------------
+class AnnotationListResponse(BaseModel):
+    """会话标注列表响应 Schema。"""
+
+    items: list[AnnotationResponse]