F-tools: the runner's views consumer is proven on the real bus; the heartbeat is asked of the bus only when a bundle wants it, with no race; a seat record says when the bus wrote it; the beat test counts ticks, not sleeps

Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig

node-tools/internal/bus/seat_test.go

@@ -213,6 +213,9 @@ func TestAnAskerReadsItsOwnRecordAndNoOther(t *testing.T) {
 	if err != nil || got == nil || string(got.Value) != `{"state":"open"}` {
 		t.Fatalf("the asker could not read its own ask: %v %v", got, err)
 	}
+	if got.At.IsZero() || time.Since(got.At) > time.Minute {
+		t.Errorf("the record does not say when the bus wrote it: at %v", got.At)
+	}
 	if missing, err := conn.SeatRecord("mesh-delivery", "messenger_asks", "a2"); err != nil || missing != nil {
 		t.Fatalf("a missing ask read as %v, %v", missing, err)
 	}