Rule-based PII scrubber: phones, e-mails, SNILS (checksum-aware), passport,
INN, cards, dates of birth, addresses, URLs/handles and person names
(dictionary in config/privacy/names_ru.yaml + declension, patronymic and
surname heuristics). Idempotent via fixed-point iteration; false-positive
guards for ordinary clinical text. pseudo_id normalises SNILS to 11 digits
and returns HMAC-SHA256 truncated to 32 hex chars.
Refs #2
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
