confide:anon — local PII redaction

Redact personally identifying information from a transcript (or a whole folder) using the layered local stack in shared/confide_core.py: regex (emails / URLs / phones / IDs / dates) → Natasha (RU named entities) → local LLM (quasi-identifiers). Spans are interval-merged and replaced with placeholders. The result is a GREEN copy safe to review.

By default anon emits a reversible map: unique reserved-sentinel placeholders (the same EXACT value always becomes the same [CONFIDE_<TYPE>_<NNNN>], e.g. [CONFIDE_PERSON_0001], [CONFIDE_EMAIL_0001], [CONFIDE_DATE_0002]) plus a sibling <name>.map.json (structured: schema_version, doc_id, green_sha256, created, entries[]) mapping each placeholder to its original. The CONFIDE_ sentinel is reserved — a real transcript essentially never contains it, so there is no collision risk and rehydrate never touches ordinary prose like "Person 1". This is exact-value matching, not entity coreference: inflected forms (e.g. RU "Марина" vs "Марины") are SEPARATE placeholders (no lemmatized merge). That map is the secret — the ONLY artifact with originals; it stays local and enables confide:rehydrate to put real values back into a cloud analysis of the GREEN text (round-trip: redact → analyze the green → rehydrate locally). Use --no-map for the legacy non-reversible [TYPE] style (no map written).