Add convenient shell script for validating all lexicon schemas and test data. **Added:** - scripts/validate-schemas.sh - Wrapper around cmd/validate-lexicon **Usage:** ```bash ./scripts/validate-schemas.sh ``` **Features:** - Validates all 58 lexicon schema files - Validates cross-references between schemas - Tests all lexicon test data files (15 valid, 11 invalid) - Reports test coverage per record type This script makes it easy to verify lexicon changes before committing, addressing the PR review requirement for lexicon validation. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>