Add lib/api/cap.js: requireWrite(entity_type) maps HTTP method to
action, runs canAct, and tags req.capTier as allow|suggest|deny→403.
Mutating routes (pages, projects, tasks, refs, resources, source_docs)
now check req.capTier and either run the repo (allow) or divert to
pending_changes returning 202 (suggest). Owner and worker actors stay
on the allow path. requireOwner helper added for Task 11.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Add lib/api/routes/refs.js: list with space_id/kind filters and
paginated, create, get/patch/delete by id, and /upsert that maps to
repo.upsertByExternal for idempotent capture-source ingest.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
