feat: Refactor LLM router and integrate health check endpoint

- Simplified LLM call logic in llm_router.py, removing tool adapter complexity and enhancing error handling.
- Added health check endpoint to main.py for system status verification.
- Cleaned up router.py by removing unused imports and commented-out code, streamlining the structure.
- Updated docker-compose.yml to unify services under a single Lyra container, enhancing deployment simplicity.
- Created Dockerfile for unified container setup, including both Relay and Cortex services.
- Added QUICKSTART.md for improved onboarding and usage instructions.
- Implemented start.sh script to manage service startup and health checks.

core/relay/server.js

@@ -21,9 +21,9 @@ app.use(express.json());
 
 const PORT = Number(process.env.PORT || 7078);
 
-// Cortex endpoints
-const CORTEX_REASON = process.env.CORTEX_REASON_URL || "http://cortex:7081/reason";
-const CORTEX_SIMPLE = process.env.CORTEX_SIMPLE_URL || "http://cortex:7081/simple";
+// Cortex endpoints (localhost since they're in the same container now)
+const CORTEX_REASON = process.env.CORTEX_REASON_URL || "http://localhost:7081/reason";
+const CORTEX_SIMPLE = process.env.CORTEX_SIMPLE_URL || "http://localhost:7081/simple";
 
 // -----------------------------------------------------
 // Helper request wrapper