ERP-5987 — invoice groups, so ERP2's AUTO_ADD_TO_SPECIFIC billing-profile mode has something to point at. Unlike every other feed here, these are per-CLIENT, not per-company: company 25 alone has 895 groups across 348 clients. `clientId` is therefore carried on every row so a selector can filter — a flat list of 895 is not a dropdown anyone can use. Company-scoped rather than taking a client parameter because the ERP2 mirror caches per tenant, not per client, and a per-client feed would mean one request per client on every refresh. Filtering client-side off one cached list is the cheaper shape.