New top-level command with list, add, remove subcommands. Supports
-n/--node to target a specific node. Adds AddProxyRoute and
RemoveProxyRoute RPCs to the agent. Moves route listing from
mcp node routes to mcp route list.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
mcp dns queries MCNS via an agent to list all zones and DNS records.
mcp node routes queries mc-proxy on each node for listener/route status,
matching the mcproxyctl status output format.
New agent RPCs: ListDNSRecords, ListProxyRoutes.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
