Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Switch from upstream Geant4/geant4 on GitHub to lbogner/geant4 on GitLab, which carries the minicalosim-spawning branch with the pre-assigned track ID changes. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Tracks HEAD of https://github.com/Geant4/geant4.git at depth 1 for reference browsing. shallow=true ensures others also get a shallow clone. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>