J2: a state read carries the time the bus wrote the value, as at (stdio.StateEntry.At)

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

node-tools/internal/bus/state_watch_test.go

@@ -151,7 +151,7 @@ func TestAMembershipTheGrantsPartWroteWrappedIsServed(t *testing.T) {
 	if _, err := conn.StatePut("gitea", "repos", "novox.hq", []byte(`{"v":1}`)); err != nil {
 		t.Fatalf("the state the membership issues is refused: %v", err)
 	}
-	if e, err := conn.StateGet("gitea", "repos", "novox.hq"); err != nil || e == nil || string(e.Value) != `{"v":1}` {
+	if e, err := conn.StateGet("gitea", "repos", "novox.hq"); err != nil || e == nil || string(e.Value) != `{"v":1}` || e.At.IsZero() || time.Since(e.At) > time.Minute {
 		t.Errorf("the state reads back %+v, %v", e, err)
 	}
 	conn.Follow("pages")