Synthetic fixtures only. Sanitized summary of actual original runs; raw logs retained privately.
Runtime: Python 3.14.9
$ python -B -m pytest -q -p no:cacheprovider test_json_to_csv.py
4 passed, 9 subtests passed in 0.58s
exit=0

$ python -B -m unittest -v test_csv test_json_to_csv test_delivery
Ran 22 tests in 3.838s
OK
exit=0

A non-failing unclosed-test-file ResourceWarning occurred in the original unittest run. Private paths and diagnostic source details omitted; not a clean-warning claim.