fix: update OLLAMA_API_URL to correct endpoint and enable follow_redirects in HTTP client

backend/app/main.py

@@ -11,7 +11,7 @@ from app.auth import get_discovery, settings, validate_token
 from app.schemas import AuthCallbackRequest, AuthConfigResponse, ChatRequest
 
 OLLAMA_API_KEY = os.getenv("OLLAMA_API_KEY")
-OLLAMA_API_URL = os.getenv("OLLAMA_API_URL", "https://api.ollama.com/v1/chat/completions")
+OLLAMA_API_URL = os.getenv("OLLAMA_API_URL", "https://ollama.com/v1/chat/completions")
 if not OLLAMA_API_KEY:
     raise RuntimeError("Environment variable OLLAMA_API_KEY is required")
 
@@ -44,7 +44,7 @@ async def event_stream(request: ChatRequest) -> AsyncGenerator[str, None]:
         "Accept": "text/event-stream",
     }
 
-    async with httpx.AsyncClient(timeout=None) as client:
+    async with httpx.AsyncClient(timeout=None, follow_redirects=True) as client:
         async with client.stream("POST", OLLAMA_API_URL, json=payload, headers=headers) as response:
             if response.status_code >= 400:
                 text = await response.aread()