gemini added as service in app.py

app.py

@@ -85,6 +85,8 @@ async def forward_request(
             ai_vendor = "openai"
         elif ai_model in settings.ANTHROPIC_MODELS:
             ai_vendor = "anthropic"
+        elif ai_model in settings.GEMINI_MODELS:
+            ai_vendor = "gemini"
         service = AIServiceFactory.get_service(ai_vendor)
 
         try: