* Fix release workflow: Python compatibility issues
- Linux: Add --find-interpreter for cross-compilation
- macOS/Windows: Pin Python to 3.12 (PyO3 0.20.3 max supported)
* Fix Linux release: limit Python versions to 3.10-3.12
PyO3 0.20.3 only supports up to Python 3.12. Using --find-interpreter detected Python 3.13/3.14 in the manylinux container which caused build failures.