test(uploads): the worker waits for its heartbeat to finish -- a mutation that skipped the wait survived until now

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/uploads/worker_progress_test.go

@@ -131,6 +131,7 @@ func TestWorkerProgress_AShutdownIsNotRecordedAsAFailedStep(t *testing.T) {
 func TestWorkerProgress_TheHeartbeatBeatsWhileAnEngineCallIsStuckAndStopsWhenTheJobEnds(t *testing.T) {
 	r := newWRig(t, time.Minute)
 	r.tr.block = make(chan struct{})
+	r.st.beatDelay = 20 * time.Millisecond
 	w := newProgressWorker(t, r, r.tr, uploads.WithHeartbeat(5*time.Millisecond, time.Hour))
 	done := make(chan struct{})
 	go func() { defer close(done); w.Process(context.Background(), r.spool(t, "a")) }()