feat: OpenRouter engine, with OPENROUTER_API_KEY env var

backend/src/agent.py

@@ -3,8 +3,6 @@ import json
 import inspect
 import time
 
-from inference import LlamaMessage, replicate_llama_completion
-import gral
 from temporary import generate_tmp_id
 
 # Tool related classes must be moved to a different module