Ported from PR #15 (packages-side surface only; the fork's dev UI page is
intentionally dropped - the API surface is the product):
- job_events table + repository, worker emits stage transitions, additive
GET /v1/clones/:id/events polling route. The fork's hand-written
migration was never registered in Drizzle's journal (it silently never
applied); regenerated properly via drizzle-kit from schema.ts with the
(job_id, seq) index declared, and verified against a live Postgres
- In-memory backend moves to the documented enqueue-202 + poll contract
with single-flight BUSY guard; POST honors backend httpStatus
- app-preview static serving routes; the preview BUILD half is deferred
until the compiler exports buildApp/DEFAULT_HARNESS_DIR - routes 404
cleanly until then
- preview option threaded through core types; cache key intentionally
unchanged while the flag is inert
All workspaces typecheck; api 18/18, core 13/13, worker 1/1 pass;
migration verified applying (table + index + FK) on postgres:16.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
