test: fix queue health test type mismatch

internal/output/frame_queue_test.go

@@ -90,7 +90,7 @@ func TestFrameQueueHealthIndicator(t *testing.T) {
 		t.Fatalf("expected initial health critical, got %s", stats.Health)
 	}
 
-	push := func(seq int) {
+	push := func(seq uint64) {
 		frame := &CompositeFrame{Sequence: seq}
 		if err := q.Push(ctx, frame); err != nil {
 			t.Fatalf("push %d failed: %v", seq, err)