Document feed

GET /tenders/documents returns the same documents for all tenders of your organisation as a cursor-paginated feed ordered by (updated_at, id) — the same modified_since / cursor / limit contract as GET /tenders. Poll it to archive documents without walking every tender:

A document comes back whenever its record changes:

• it was uploaded — also after the tender was first handed over;
• a user edited its document custom fields (e.g. moved it to another archive folder);
• a user asked for it to be sent to the ERP again (erp_export_requested_at moved).

Internal processing can touch a document as well, so treat an appearance as "look again", not as "archive again": decide by id together with erp_export_requested_at and custom_fields whether to file it anew. Page with next_cursor until it is null, then keep the last updated_at as your next modified_since.