[ArfiArfath21]

Issue number: closes #8563

Summary

Changes

CsvTransform.transform() no longer pops encoding and newline from its own transform_options; it works on a copy. Adds a regression test that applies one CsvTransform(encoding="latin-1", delimiter=";") to two objects.

User experience

Before: the second use of the same CsvTransform instance (or a re-created S3Object transformed stream) silently decoded as UTF-8 and could raise UnicodeDecodeError or return wrong text. After: every use honours the configured options.

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[leandrodamascena]

Nice catch @ArfiArfath21, and thanks for the clear repro! I confirmed the second use of the same CsvTransform fails on develop and works with this change, with options left intact. Approving. Heads-up: this and #8566 touch the same import line in test_s3_object.py, so whichever lands second will need a quick rebase.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.93%. Comparing base (bf2e917) to head (5ef2ce0).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #8565   +/-   ##
========================================
  Coverage    96.93%   96.93%           
========================================
  Files          318      318           
  Lines        15998    15999    +1     
  Branches      1419     1419           
========================================
+ Hits         15507    15508    +1     
  Misses         349      349           
  Partials       142      142           

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[ArfiArfath21]

Rebased onto develop now that #8566 has landed. The only conflict was the shared import line and the end of test_s3_object.py in the tests, so I kept both sets of tests. No changes to csv.py. Needs a quick re-approval since the push dismissed the earlier one. Thanks!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[leandrodamascena]

Re-approving after the rebase on top of #8566, the change is identical. Thanks!