Add FastMCP server integration

[xsa-dev]

Summary

• add a dedicated FastMCP server module that exposes tools for starting and managing Jesse workers
• provide a jesse fastmcp CLI command to run the MCP server with configurable transports
• update dependencies to include fastmcp support and cover new versions, and add unit tests for the integration

Testing

• pytest tests/test_fastmcp_integration.py

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https://chatgpt.com/codex/tasks/task_e_68dae7b63424832b8bc9ce4e7f43e171

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Note

Introduces a FastMCP server with tools to start/manage workers, a jesse fastmcp CLI to run it over multiple transports, dependency updates, and integration tests.

• Services (MCP):
  • Add FastMCP integration in jesse/services/mcp/ with create_fastmcp_server and run_fastmcp_server.
  • Expose tools: start_backtest, list_processes, cancel_process, flush_processes using process_manager.
  • Define payload models StartBacktestPayload and CancelProcessPayload.
• CLI:
  • Add jesse fastmcp command in jesse/__init__.py with options --transport, --host, --port, --hide-banner.
• Dependencies:
  • Add fastmcp~=2.12.4.
  • Bump uvicorn to ~=0.37.0 and python-dotenv to ~=1.1.0.
• Tests:
  • Add tests/test_fastmcp_integration.py covering tool registration and backtest payload ID generation.

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