Show additional data in debug log header

ts/logging/formatCountForLogging.ts

@@ -0,0 +1,10 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+export const formatCountForLogging = (count: number): string => {
+  if (count === 0 || Number.isNaN(count)) {
+    return String(count);
+  }
+
+  return `at least ${10 ** Math.floor(Math.log10(count))}`;
+};