A-112: the node-engine reads recovery-wait-minutes from a file its manifest declares, 90 when missing

The manifest declares the file recovery-wait (content ${config:recovery-wait-minutes}); the node-engine reads it at its start and
does not call stdio.Config, which needs the runtime that launches a bundle.

Builds: design 47 G §633, A-112
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h

packaging/operator_keys_test.go

@@ -76,6 +76,9 @@ func TestTheManifestConsumesTheBackupEvent(t *testing.T) {
 			t.Errorf("invokes %v lacks %s", m.Invokes, v)
 		}
 	}
+	if !strings.Contains(string(raw), `"content": "${config:recovery-wait-minutes}\n"`) {
+		t.Errorf("module.json declares no file with the content ${config:recovery-wait-minutes} (design 47 G A-112)")
+	}
 	if m.Config["recovery-wait-minutes"].Default != float64(90) {
 		t.Errorf("config recovery-wait-minutes is %+v, want default 90", m.Config["recovery-wait-minutes"])
 	}