Resolve a project's completion readiness

Returns { projectId, projectType, transition, source, items, requiredGaps, hiddenItemCount, waivers, ready, mode, lastCheck }. mode is the effective enforcement mode, waivers the active waivers (a waived item carries waiverId and is never a gap), lastCheck the latest recorded check or null. Applicability is decided live: active criteria for every project type plus those for this project's type. auto items carry outcome (pass | fail | unknown) and detail, recomputed on every call; manual and ai items carry their stored status (NOT_STARTED | IN_PROGRESS | DONE | NA), created on first read. Only a required, non-ai item that fails (auto) or is not DONE or NA (manual) is a gap; unknown never is. Any caller who can read the project.