* feat(api): add IAM-authenticated menu publication
Keep weekly menu writes behind Lambda so the GitHub runtime role cannot access the shared DynamoDB table directly.
* refactor(workflow): publish weekly menus through API
Use SigV4 requests for settings and menu publication so the scheduled workflow no longer needs direct DynamoDB access.
* fix: address review comments
* style(python): apply Ruff formatting
Apply ruff check --fix and ruff format across all Python files to
pass CI pipeline. Remove unused imports (os, sys), fix f-strings
without placeholders. Update README to reflect sync-roster Lambda,
corrected shared layer path, and current project structure.
Playwright-based menu scraper for Redefine Meals, self-contained HTML
order form with S3/CloudFront hosting, DynamoDB-backed order submission
via API Gateway, and automated payroll deduction reports via SES.