* fix: MCP reconnect via tool passes only server_id to connect_server
connect_server requires name, transport, command, args, env, and url
but the reconnect path in do_manage_mcp only passed the server_id,
causing a TypeError on every reconnect attempt. Mirror the pattern
used in mcp_routes.py reconnect_server.
* test: verify MCP reconnect passes full server config to connect_server
Mocks the MCP manager and DB to assert that do_manage_mcp reconnect
passes name, transport, command, args, env, and url — not just the
server_id.
