Chat archive API. All /api/ calls need the header Authorization: Bearer <ARCHIVE_API_TOKEN>.

GET /api/rooms                                 rooms as JSON
GET /api/rooms/<room_id>/room.md               readable transcript
GET /api/rooms/<room_id>/messages.jsonl        one JSON object per message (current state), ?since=YYYY-MM-DD
GET /api/rooms/<room_id>/export.zip            ?format=all|md|json&since=YYYY-MM-DD&nofiles=1
GET /api/rooms/<room_id>/attachments/<file>    one downloaded file

Element widget (export button): /addwidget https://archive.34-141-47-207.sslip.io/widget?room=$matrix_room_id