[Hashim1999164]

Closes #365

The three summary tally dictionaries were copied from one template with dict.copy, so they shared a single difference_types set. Each tally now comes from a small factory that builds a new dictionary and a new set.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.95%. Comparing base (c2a18b4) to head (21b973b).
⚠️ Report is 5 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #367   +/-   ##
========================================
  Coverage    96.95%   96.95%           
========================================
  Files            9        9           
  Lines          591      592    +1     
========================================
+ Hits           573      574    +1     
  Misses          18       18           

Flag	Coverage Δ
python-3.11	96.95% <100.00%> (+<0.01%)	⬆️
python-3.12	96.95% <100.00%> (+<0.01%)	⬆️
python-3.13	96.95% <100.00%> (+<0.01%)	⬆️
python-3.14	96.92% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[danielfromearth]

Hi @Hashim1999164, thank you for this PR! It looks clean, and I confirmed the new test is red on the pre-fix code and green after.

I'm requesting only two small consistency changes: moving the CHANGELOG entry into the existing ### Fixed section (it currently adds a second one), plus a tmp_path nit.

[Hashim1999164]

@danielfromearth both nits are in. changelog entry is under the existing Fixed section and the test uses tmp_path now. ready for another look whenever you are