AtAuth

fix: replace unstable is_multiple_of with modulo check

The is_multiple_of method is unstable (rust-lang/rust#128101). Use simple modulo check for stable Rust compatibility. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>


Author Bryan Brooks Co-author Claude Opus 4.5 Date Commit Parent 73132c81
+1 -1
1 changed file
+1 -1
1 changed file