Trace-driven debugging — turn a 4-hour panic into a 20-minute investigation — step 5 of 9

The detector needs a fingerprint for each row that's hashable so it can go into a set. args is a dict (not hashable). Wrap it in frozenset(...) over its .items() so two dicts with the same content produce the same fingerprint regardless of key order.

Fill the blank.

Expected output:

distinct calls: 2