* Fix Dependabot security updates and bump GitPython to 3.1.47+
Dependabot's uv ecosystem resolver was inferring Python 3.9 from the
workspace root's requires-python, then failing because sub-packages
require >=3.12. Adding .python-version=3.12 tells the resolver to use
a compatible Python. Also bumps gitpython>=3.1.47 to resolve the two
open security advisories (GHSA unsafe option check, command injection).
* Bump codeflash-core and codeflash-python versions for release
