Clear old voice files

POST /v1/voice/cleanup

Delete persisted voice audio (spoken replies + mic recordings) on chat messages older than older_than_days (default 30, range 0-3650). The message rows stay; only the audio file + its metadata key are removed, so an old reply read aloud again re-synthesizes on demand. Returns counts + bytes freed.

Request body

{ "older_than_days": 30 }

Response body

{ "ok": true, "older_than_days": 30, "deleted_files": 12, "freed_bytes": 345678, "messages_affected": 9 }