* Add test cases for the `mask_str` function
* Add custom masking function support through mask_callable
* Add test cases for custom masking function
* Update documentation for custom masking function
* fix test case
* rename `AUDITLOG_DEFAULT_MASK_CALLABLE` variable
-AUDITLOG_DEFAULT_MASK_CALLABLE to `AUDITLOG_MASK_CALLABLE`
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* Update `CHANGELOG.md` to include mask function customization feature
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
