docs: add commit message guidelines to CLAUDE.md

Add guidelines to prevent AI assistant attribution in commit messages.
This ensures commits follow project conventions without AI tool references.

Author: randygrok

CLAUDE.md

@@ -169,3 +169,10 @@ go test -race ./package/...
 - Follow the existing code patterns
 - Update tests when changing functionality
 - Keep commits focused and atomic
+
+## Commit Message Guidelines
+
+- Write clear, concise commit messages following conventional commits format
+- Do not include AI assistant attribution in commit messages
+- Do not add "Generated with" or "Co-Authored-By" lines referencing AI tools
+- Focus commit messages on the technical changes and their purpose