Fix UniFi OS authentication and simplify server architecture

- Use /api/auth/login for UniFi OS controllers (UDM, Cloud Gateway)
- Use /api/login for standalone controllers
- Refactor to use FastMCP's native mcp.run() with custom_route for /health
- Switch to network_mode: host for local network access
- Include README.md in Dockerfile for hatchling build

Dockerfile

@@ -6,8 +6,8 @@ WORKDIR /app
 # Install build dependencies
 RUN pip install --no-cache-dir uv
 
-# Copy dependency files
-COPY pyproject.toml ./
+# Copy dependency files and README (required by hatchling)
+COPY pyproject.toml README.md ./
 
 # Create virtual environment and install dependencies
 RUN uv venv /app/.venv