Add a first-stage artifact-registry CLI for D601 host-managed CNCF Distribution planning, rendering, dry-run install, and readonly status checks. Document the loopback-only boundary and future backend-core artifact CD flow.\n\nCloses #1.
Extract config, context, logger, types, db, http, overview, performance,
provider-registry, scheduler, task-dispatcher, microservice-proxy,
ssh-bridge, and egress-tcp into separate files. index.ts now only handles
server setup, HTTP/WebSocket routing, and startup orchestration.
No behavioral changes — all existing tests and health checks pass.
Codex