MGASA-2026-0450 Updated python-gitpython packages fix security vulnerabilities

Denial of Service via catastrophic backtracking ReDoS in Actor.nameemailregex — commit author/committer field parsing Repository content can impersonate the git directory, leading to arbitrary code execution Residual of GHSA-hmq2-w58f-27jc: the fix validates the .gitmodules name but the sibling...