## Problem
Self-hosters with a large backlog of workflow runs stuck in `ENQUEUED`
see the recovery job (`WorkflowHandleStaledRunsJob`) fail with:
```
Error: Data validation error.
at computeTwentyORMException ...
at WorkspaceSelectQueryBuilder.getMany ...
at WorkspaceUpdateQueryBuilder.execute ...
at WorkflowHandleStaledRunsWorkspaceService.handleStaledRunsForWorkspace ...
```
So the very job meant to unblock enqueued runs can never complete, and
runs stay stuck.
## Root cause
`handleStaledRunsForWorkspace` fetched **every** staled run unbounded,
then called `repository.update(allIds, ...)`. That builds a `WHERE id IN
($1, $2, ... $N)`. Inside `WorkspaceUpdateQueryBuilder.execute`, a
"before" `SELECT` runs with that same huge `IN` list; with a big enough
backlog the bind-parameter count exceeds Postgres' limit, the `getMany`
throws a `QueryFailedError`, and `computeTwentyORMException` maps the
resulting PG error code to the generic `PostgresException('Data
validation error.')`.
There's also a secondary `before.length > QUERY_MAX_RECORDS` (200) guard
in the update path that would reject anything over 200 rows even if the
param limit weren't hit.
## Fix
Process staled runs in batches of `QUERY_MAX_RECORDS` (200), looping
until a pass finds none left — the same batching pattern the sibling
clean-runs job already uses. Each update flips the batch from `ENQUEUED`
to `NOT_STARTED`, so the find criteria stops matching them and the loop
terminates. The throttling recompute now runs once at the end, and only
if at least one batch was reset.
## Tests
New unit spec covering:
- no staled runs -> no update, no recompute
- single batch -> correct ids/payload, recompute once
- exactly 200 -> `take: 200`, 200 ids per update
- 450 backlog -> 3 update calls (200/200/50), loops until empty,
recompute exactly once
All 4 pass locally.
## Note
This fixes the recovery job. If runs keep re-accumulating as `ENQUEUED`,
there may be a separate producer-side issue worth investigating.
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Thomas Trompette
6bc4d8efac
