Add HTTP transport support for cloud deployment

Enables deployment to cloud platforms (Render, Railway, etc.) while maintaining
backward compatibility with existing stdio transport for Claude Desktop.

New features:
- HTTP server entry point (run_http_server.py) using uvicorn
- Docker containerization with Python 3.13
- Health check endpoint at /health
- Comprehensive deployment documentation for Render, Railway, and Docker

Technical changes:
- Added uvicorn dependency for ASGI server
- Created Dockerfile with optimized multi-stage build (343MB)
- Added .dockerignore for efficient Docker builds
- Implemented /health endpoint using Starlette JSONResponse
- Updated README.md and DEPLOYMENT.md with HTTP deployment guides

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

requirements.txt

@@ -3,3 +3,4 @@ python-dotenv>=1.0.0,<2.0.0
 mcp>=1.0.0,<2.0.0
 fastmcp>=0.1.0,<1.0.0
 pydantic>=2.0.0,<3.0.0
+uvicorn>=0.27.0,<1.0.0