A non-delayed run used to get two execution snapshots the moment it was
triggered: `RUN_CREATED` nested in the run-create transaction,
immediately followed by `QUEUED` from its own `BEGIN`/`INSERT`/`COMMIT`.
It now gets a single `QUEUED` snapshot written inside the create, and
the trigger path only publishes to the queue. One fewer row per run on
`TaskRunExecutionSnapshot`, and one fewer round trip on the trigger hot
path.
`EnqueueSystem` gains a `publishRun` seam that enqueues without writing
a snapshot. Every re-enqueue path (waitpoint resume, checkpoint restore,
delayed enqueue, pending version, retry requeue) still calls
`enqueueRun` and writes its own `QUEUED`, so only the first enqueue
changes. The `QUEUED` snapshot still commits before the queue message,
so a dequeue sees a dequeueable status exactly as before.
Two things for reviewers. Nesting the write skips
`createExecutionSnapshot`, which is what emits
`executionSnapshotCreated` and therefore the run timeline's `[engine]
QUEUED` entry, so the trigger path now emits it directly, the same way
the dequeue and attempt-start paths already do for their nested creates.
And `RUN_CREATED` is still written when a dequeued run has no background
worker yet, so the status and both `statuses.ts` helpers stay live and
existing rows keep reading correctly.
Delayed runs are untouched: `DELAYED` then `QUEUED` are two genuinely
different moments and stay two snapshots.
Rollback is a revert. Create-and-enqueue happen in one request in one
process, so no in-flight run needs both code paths to agree during a
rollout.
One note for whoever debugs this path later. The `QUEUED` snapshot now
commits before the queue publish, so a failed publish leaves the run
recorded as `QUEUED` with no queue message. That state was already
reachable, since the publish was never part of the snapshot transaction,
but it used to be recorded as `RUN_CREATED`, which was distinctive
because it never otherwise persisted. `QUEUED` with no message is
indistinguishable from a run waiting on a concurrency slot, so
trigger-time publish failure is now one more cause of an apparently
stuck queued run.
Eric Allam
f10bc23785