Fix pylint false positives for ThreadPoolExecutor (#4244)

* Bump pylint to 4.0.5 to fix Python 3.14 concurrent.futures false positives

* Fix too-many-positional-arguments pylint failures - Add max-positional-arguments=10, Add pylint: disable=too-many-positional-arguments to functions that legitimately exceed the limit

* Bump max-positional-arguments to 12 and remove unnecessary disable comments

* Address review comments: fix CHANGELOG, remove stale pylintrc comment, add openai-agents disable

* Fix formatting: restore blank line in CHANGELOG and remove extra blank line in .pylintrc

* Update processor.py

* Update test_botocore_bedrock.py

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Co-authored-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>