* admin: expose per-job-type detection interval in plugin UI
The detection_interval_seconds field was not editable in the admin UI.
collectAdminSettings() silently preserved the existing value, making it
impossible for users to change how often a job type checks for new work.
Users would change the global "Sleep Between Iterations" setting expecting
it to control job scheduling frequency, but that only controls the
scheduler loop's idle polling rate.
Add a "Detection Interval (s)" input to the per-job-type admin settings
form so users can actually configure it.
Fixes#8549
* admin: remove global Sleep Between Iterations setting
Now that per-job-type detection intervals are exposed in the UI, the
global IdleSleepSeconds setting is redundant and confusing. It only
controlled the scheduler loop's idle polling rate, which is always
overridden by earliestNextDetectionAt() when job types exist.
Replace the three usages with simpler alternatives:
- Scheduler loop sleep: use defaultSchedulerIdleSleep constant
- Initial delay for new job types: use policy.DetectionInterval/2
(more logical since it's already per-job-type)
- Status fallback: use the constant
The API endpoints are kept for backward compatibility but the UI
no longer exposes or calls them.
* admin: restore configurable idle sleep in scheduler loop
The EC integration test sets idle_sleep_seconds=1 via the scheduler
config API so the scheduler wakes quickly after workers connect. The
previous commit replaced this with a hardcoded 613s constant, causing
the scheduler to sleep through the entire test window.
Restore GetSchedulerConfig().IdleSleepDuration() in the scheduler loop
and status reporting. The UI removal of the setting is still correct —
the API endpoint remains for programmatic use (e.g., tests).
* admin: cap first-run initial delay to 5s instead of DetectionInterval/2
The initial delay for first-run job types was set to
policy.DetectionInterval/2, which creates unbounded first-run latency
(e.g., 1 hour for vacuum with a 2-hour detection interval). A small
fixed 5-second delay provides sufficient stagger without penalizing
startup time.
Chris Lu