use fastgpt python sdk

src/core/fastgpt_client.py

@@ -0,0 +1,39 @@
+"""FastGPT client dependency injection."""
+from contextlib import asynccontextmanager
+from fastapi import FastAPI
+from fastgpt_client import AsyncChatClient
+from .config import Config
+
+# Global client instance
+_fastgpt_client: AsyncChatClient | None = None
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """Manage FastGPT client lifecycle."""
+    global _fastgpt_client
+    Config.validate()
+    
+    # Initialize client
+    _fastgpt_client = AsyncChatClient(
+        api_key=Config.FASTGPT_API_KEY,
+        base_url=Config.FASTGPT_BASE_URL,
+        timeout=60.0,
+        max_retries=3,
+        retry_delay=1.0,
+        enable_logging=Config.DEBUG,
+    )
+    await _fastgpt_client.__aenter__()
+    
+    yield
+    
+    # Cleanup
+    if _fastgpt_client:
+        await _fastgpt_client.__aexit__(None, None, None)
+
+
+def get_fastgpt_client() -> AsyncChatClient:
+    """Get the FastGPT client instance."""
+    if _fastgpt_client is None:
+        raise RuntimeError("FastGPT client not initialized")
+    return _fastgpt_client