- Vitest unit tests for POST /api/erase: validation, form-only
providers, all email providers, CRLF sanitization
- Snapshot on PROVIDER_DATA to catch provider config drift
- Mock via require cache to avoid nodemailer/sendmail dependency
- sendErasureMail call assertions (args + call count)
- fetch-test-emails.mjs script to refresh disposable email pool
- mailer: add Reply-To header pointing to requester email
- mailer: fallback to direct transport when sendmail unavailable
