bugfix

internal/jobs/domain.go

@@ -83,6 +83,14 @@ func IsPermanent(err error) bool {
 	return errors.As(err, &pe)
 }
 
+// ErrLeaseLost is returned by the terminal/retry write-back methods
+// (Complete, FailWithRetry, DeadLetter) when the fencing predicate matches no
+// row: the job is no longer leased by this worker (e.g. the reaper re-leased it
+// to another worker after the lease timeout). The caller must treat this as a
+// no-op — the write was correctly dropped to avoid clobbering the new run's
+// state — and must NOT surface it as a failure that triggers further retries.
+var ErrLeaseLost = errors.New("job lease lost; write-back skipped")
+
 // RunnerConfig is the per-runner configuration loaded from config.yaml.
 // Zero Interval means "use the runner's documented default".
 type RunnerConfig struct {