Evolve the MVP project registry (#427) into a versioned, fail-closed
project registry API for the console (Phase 1, read-only).
- Add schema version 2 with project `status`, per-step onboarding
`state`/`required`, optional redacted `last_seen_health`, and
`remote_name`. Version 1 files stay loadable and are normalized with
explicit defaults.
- Serve `/api/v1/projects` and `/api/v1/projects/{project_id}` with API
provenance (`api_version`, `schema_version`, `source`). `/api/projects`
is retained as an unversioned Phase 1 alias.
- Replace bare `ValueError` with `RegistryError`, carrying an operator
`remediation` and `field_path`; invalid registries fail closed as a
500 JSON payload or a dedicated HTML error page instead of a traceback.
- Reject credential-shaped keys before any DTO is built, reusing
`registry_safety.is_forbidden_key` as the single source of truth
shared with the worker registry (#798).
- Render HTML views from `project_to_dict`, so the console and the JSON
API cannot disagree about status or onboarding progress.
- Document the contract in docs/webui-project-registry-api.md.
Tests: registry load/validate (valid, missing project, schema
validation, credential rejection) and API route coverage.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
