feat: 集成Hermes智能体系统，增强聊天和差旅报销功能

server/src/app/schemas/hermes.py

@@ -0,0 +1,25 @@
+from __future__ import annotations
+
+from typing import Any, Literal
+
+from pydantic import BaseModel, Field
+
+
+HermesCallbackStatus = Literal["running", "succeeded", "failed"]
+
+
+class HermesCallbackWrite(BaseModel):
+    type: str = Field(min_length=1, max_length=80)
+    run_id: str = Field(min_length=1, max_length=80)
+    status: HermesCallbackStatus
+    summary: str = ""
+    error: str = ""
+    payload: dict[str, Any] = Field(default_factory=dict)
+
+
+class HermesCallbackRead(BaseModel):
+    ok: bool = True
+    accepted: bool = True
+    type: str
+    run_id: str
+    status: HermesCallbackStatus