All REST endpoints wired with chi router: projects, stages, instances,
deploys, registries, settings, quick deploy, webhook. Full main.go
wiring with graceful shutdown. Consistent JSON envelope responses.
Sensitive fields stripped from API responses.
Create structured plan files with 12 phases covering the full
implementation: scaffold, store, crypto, Docker/NPM clients,
registry poller, webhook, deployer, API layer, SvelteKit frontend,
embedding, and hardening.