Minimum batch size

The minimum batch size has been clamped to at least 256 elements (and a multiple of the largest gear/wheel). This should reduce mutex contention for small gear/wheel sizes.

Full Changelog: v6.2.1...v6.2.2

sha1sum results:
f630378f6770136ab38eef9431a8fea88376eee6 FindAFactor-6.2.2-cp310-cp310-manylinux_2_35_x86_64.whl
fc5ecb5dc09731c5f482730b3b27358e2c3950a9 FindAFactor-6.2.2-cp312-cp312-manylinux_2_39_x86_64.whl
a7c7cfad5da3112216b0b7ff3aac523677ff0626 FindAFactor-6.2.2-cp312-cp312-win_amd64.whl
d057accaa52ec149a18f87da7c6699b8ca4f5fbf FindAFactor-6.2.2-cp313-cp313-macosx_13_0_x86_64.whl
c01d346d956c4c310777d625ad6854916735e607 FindAFactor-6.2.2-cp313-cp313-macosx_14_0_arm64.whl
593833bc48e03a7755d9b718d53bd8805be06172 FindAFactor-6.2.2-cp313-cp313-macosx_15_0_arm64.whl
b5635418e41d7a8705c53a49c809ae022477564e FindAFactor-6.2.2-cp38-cp38-manylinux_2_31_x86_64.whl
bd5d29d415167213e9418758d6a4630ca5b9e2b2 findafactor-6.2.2.tar.gz