Migrate from Groq to OpenRouter (gpt-oss-120b:free) and update configuration

.env

@@ -1,3 +1,4 @@
-XAI_API_KEY=xai-Q6zYpn9C8ReN8bGZmp8QIgvyv8ZNee9UusbqUFpT4zPQpblvd1RTerx1mgRtu6L1n8DkdHV5lnzGi23D
+
 REDIS_HOST=redis
 REDIS_PORT=6379
+TESCO_AI_SUPPORT_OPENROUTER_MODEL_KEY=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

docker-compose.yml

@@ -6,7 +6,7 @@ services:
     ports:
       - "8000:8000"
     environment:
-      - XAI_API_KEY=${XAI_API_KEY}
+      - TESCO_AI_SUPPORT_OPENROUTER_MODEL_KEY=${TESCO_AI_SUPPORT_OPENROUTER_MODEL_KEY}
       - REDIS_HOST=redis
       - REDIS_PORT=6379
     volumes:

llm.py

@@ -9,15 +9,15 @@ logger = logging.getLogger(__name__)
 
 class LLMClient:
     def __init__(self):
-        self.api_key = os.getenv("XAI_API_KEY")
+        self.api_key = os.getenv("TESCO_AI_SUPPORT_OPENROUTER_MODEL_KEY")
         if not self.api_key:
-            logger.warning("XAI_API_KEY not set. LLM calls will fail.")
+            logger.warning("TESCO_AI_SUPPORT_OPENROUTER_MODEL_KEY not set. LLM calls will fail.")
         
         self.client = OpenAI(
             api_key=self.api_key,
-            base_url="https://api.x.ai/v1"
+            base_url="https://openrouter.ai/api/v1"
         )
-        self.model = "grok-4-1-fast-reasoning"
+        self.model = "openai/gpt-oss-120b:free"
         
         self.rag = RagEngine()
         self.memory = MemoryManager()