fix comment

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: sandboxcoder

profile-long-calls/long-calls-analyzer.ts

@@ -72,9 +72,10 @@ interface ParsedKey {
 }
 
 /**
- * Cache keys are formatted as "{isoDate}-{username}.zip" (see cache-uploader.ts).
- * ISO dates are always 24 chars ("2024-01-15T10:23:45.123Z"), so the username
- * starts at index 25.  Anonymous uploads have no username suffix.
+ * Cache keys are expected to use the format "{isoDate}-{username}.zip".
+ * The ISO timestamp portion is always 24 characters
+ * ("2024-01-15T10:23:45.123Z"), so the username begins at index 25.
+ * Anonymous uploads omit the username suffix.
  */
 function parseKey(key: string): ParsedKey {
   const name = path.basename(key, '.zip');