Add CLAUDE.md - #243

In .github/workflows/pull_request_automation.yml (Line: 18, Col: 11): Error from called workflow certego/.github/.github/workflows/_detect_changes.yml@edaaa635554f0ef0f92e5129fc3197d64d696f98 (Line: 75, Col: 11): Conditional expression contains literal text outside replacement tokens. This will cause the expression to always evaluate to truthy. Did you mean to put the entire expression inside ${{ }}?