feat: langchain improved

demos/use_cases/multi_frameworks/README.md

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+# Multi-Framework Travel Agents
+
+This project demonstrates multi-framework integration with both CrewAI and LangChain agents working together.
+
+## Agents
+
+- **CrewAI Flight Agent** (Port 10520): Handles flight-related queries
+- **LangChain Weather Agent** (Port 10510): Handles weather-related queries
+
+## Setup
+
+```bash
+docker compose build
+docker compose up -d
+```
+
+## Environment Variables
+
+- `OPENAI_API_KEY`: Required for LLM access
+- `AEROAPI_KEY`: Optional for flight data
+- `LLM_GATEWAY_ENDPOINT`: Plano gateway endpoint (default: http://host.docker.internal:12000/v1)