mesh-issues: keep the issues bucket at 8 values until the carry can read them, so the bus drops nothing before it is carried (hq ADR 0300 §6)

modules/mesh-issues/cmd/mesh-issues/manifest_test.go

@@ -88,14 +88,15 @@ func TestItDeclaresAndHoldsTheIssueTrackerSeatOnceForTheMesh(t *testing.T) {
 		EventTriaged, EventReady, EventReadyToVerify, EventReserved}) {
 		t.Fatalf("emits %v", m.Emits)
 	}
-	// The record is the log `changes` (ADR 0300 §1). Four states, none expiring, each one value per key: issues
-	// the fold of the log (§3), the counters, the backlog's pass of the duplicate check (ADR 0278 §6), each
-	// reserved number (issue 424).
+	// The record is the log `changes` (ADR 0300 §1). Four states, none expiring: issues the fold of the log (§3),
+	// still keeping its older values until the carry has read them (they go to one value in a follow-up), the
+	// counters one value each, the backlog's pass of the duplicate check one value (ADR 0278 §6), each reserved
+	// number one value (issue 424).
 	if !reflect.DeepEqual(m.Logs, []string{ChangesLog}) {
 		t.Fatalf("logs %v", m.Logs)
 	}
 	d := m.stateDeclarations(t)
-	if len(d) != 4 || d[0].Name != IssuesState || d[0].History > 1 || d[0].TTLSeconds != 0 ||
+	if len(d) != 4 || d[0].Name != IssuesState || d[0].History < 2 || d[0].TTLSeconds != 0 ||
 		d[1].Name != CountersState || d[1].History > 1 || d[1].TTLSeconds != 0 ||
 		d[2].Name != GroomingState || d[2].History > 1 || d[2].TTLSeconds != 0 ||
 		d[3].Name != ReservationsState || d[3].History > 1 || d[3].TTLSeconds != 0 {