v0.6.0-rc44

Update Claude hook configuration to use environment variables

- Use $CLAUDE_PROJECT_DIR for absolute paths in settings.json
- Add cd to repository root in wrapper script for consistent execution
- Remove claude-validation.sh as functionality moved to wrapper

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>