Dune Analytics MCP Server

# Tasks: Add Core MCP Server Infrastructure ## 1. Project Setup - [x] 1.1 Create pyproject.toml with Python 3.11+ requirement - [x] 1.2 Create fastmcp.json configuration file - [x] 1.3 Create src/mcp_server_dune/ package directory ## 2. Server Implementation - [x] 2.1 Create server.py with FastMCP initialization - [x] 2.2 Implement get_dune() client factory function - [x] 2.3 Add environment variable validation for DUNE_API_KEY ## 3. Entry Point - [x] 3.1 Add __main__.py for CLI execution - [x] 3.2 Configure mcp.run() entry point ## 4. Validation - [x] 4.1 Verify server starts without errors - [x] 4.2 Test API key missing error handling - [x] 4.3 Confirm uv run execution works