feat:新增投顾agent和nl2sqlagent

agent/advisor_agent/llm.py

@@ -0,0 +1,40 @@
+"""投顾 Agent 对共享 LLM 客户端的安全调用封装。"""
+from __future__ import annotations
+
+import inspect
+
+from agent.advisor_agent.fallback import call_with_fallback
+
+
+async def generate_text(
+    llm_client,
+    *,
+    system_prompt: str,
+    user_prompt: str,
+    fallback,
+    timeout: float = 5.0,
+) -> str:
+    """调用共享 LLM，超时或异常时返回本地安全兜底文本。"""
+
+    async def primary():
+        return await llm_client.chat(
+            [
+                {"role": "system", "content": system_prompt},
+                {"role": "user", "content": user_prompt},
+            ]
+        )
+
+    async def secondary():
+        value = fallback()
+        return await value if inspect.isawaitable(value) else value
+
+    result = await call_with_fallback(
+        primary,
+        secondary,
+        timeout=timeout,
+        degraded_code=50001,
+    )
+    return str(result.value)
+
+
+__all__ = ["generate_text"]