plumcp's default list_changed notification handlers (fetch-prompts,
fetch-resources, fetch-tools) fire immediately when the server sends
notifications before the initialize handshake completes. Since MCP
servers ignore requests before initialize, these handlers block forever
waiting for responses that never come, preventing the client from
completing initialization.

Override the three list_changed handlers with guarded versions that
only dispatch after initialize-and-notify! succeeds.

🤖 Generated with [eca](https://eca.dev)

Co-Authored-By: eca <noreply@eca.dev>