Retire only once the same answer has held ten minutes as well as five passes

Five passes are twenty-five seconds, shorter than a controller restart, a store
reconnecting or a file half written; the operator asked for both (hq ADR 0230).

modules/postgres/cmd/postgres-provider/harness_test.go

@@ -78,13 +78,13 @@ func TestAConsumerNoLongerAskedForIsRetiredOnceStable(t *testing.T) {
 	w.give(map[string]any{"as": "a"}, map[string]any{"as": "b"})
 	w.h.Reconcile(ctx)
 	w.give(map[string]any{"as": "a"})
-	w.passes(25 * time.Second) // five passes
+	w.settle() // five passes and ten minutes
 	if strings.Join(w.a.removed, ",") != "b" {
 		t.Fatal(w.a.removed)
 	}
 	// Only a file that says nobody asks retires the last one.
 	w.give()
-	w.passes(25 * time.Second)
+	w.settle()
 	if strings.Join(w.a.removed, ",") != "b,a" {
 		t.Fatal(w.a.removed)
 	}