fix: Python 3.11 requirements and v4.5.0 release preparation (#34)

* fix: Update Python requirement to 3.11 and fix hash mismatches

- Set Python requirement to 3.11+ consistently across all files
- Fixed pip and setuptools hash mismatches in requirements.txt
- Updated README with deterministic build documentation
- Removed incorrect Python 3.12 requirement that broke builds

* chore: Ignore release-builds directory

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Co-authored-by: Claude AI Assistant <[email protected]>

Merge pull request #17 from expatjedi/master

minor fix on payment request