## What & why
The dashboard agent's upkeep — retention deletes and the investigation
sweep — ran as cron jobs on the webapp's common worker, even though it
only touches the agent's own datastore. This moves that upkeep into the
agent's Trigger project as scheduled tasks (TRI-13182).
## What's inside
**Retention** — `internal-packages/dashboard-agent/src/maintenance.ts`,
a daily task (03:00 UTC). Deletes turn evals older than 30 days,
hard-deletes chats soft-deleted more than 30 days ago, and purges
terminal watches and submission rows older than 7 days. It used to run
every 5 minutes; nothing needs a hard delete that fast, so it is daily
now, draining in bounded batches and warning if it hits the cap. It
retries (3 attempts) because the next run is a day away. It connects
with `DASHBOARD_AGENT_DATABASE_URL`, falling back to `DATABASE_URL` like
every other task in the package (the deletes are confined to the agent's
own Postgres schema), and skips when neither is set.
**Investigation sweep** — `src/investigation-sweep.ts`, every 5 minutes,
same as before: settles investigation cards stuck `in_progress`
(30-minute window, attempt cap, force-abandon note). It keeps the fast
cadence because it fixes live state the UI is showing.
**What stays in the webapp.** The watch finalize/deliver sweep and batch
rearm: they cover a dead agent-side tick chain — a backstop can't live
inside the thing it backstops — and they need the main database and the
alerts worker. The org-deletion chat purge also stays: deletion must not
depend on the agent project being deployed. The removed cron job keeps a
cron-less tombstone entry so already-queued items drain cleanly; remove
it in a follow-up.
**Test plumbing** — the drizzle migration replayer that webapp tests
hand-rolled is now exported once from
`@internal/dashboard-agent-db/testing`; the moved tests live in the
agent package as `src/*.test.ts` against real Postgres.
## Testing
Agent package: retention passes (backlog drain, batch cap, no-op guard,
chat-delete cascade) and the sweep, on testcontainers Postgres. Webapp:
the watch/chat suites, plus a test that a settlement card stops the
dashboard spinner. Full typecheck on both.
Katia Bulatova
ee854480fe