feat(etrade): take the selected licence's trade name as the company name

A TIN routinely trades under a name that is not its registered one, and
holds several licences with different trade names — of 58 TINs checked
against eTrade, 8 had at least one licence whose trade name differs from
the registered `BusinessName`, one of them across three licences.

`extractRegistrationData` now resolves `companyName` from the selected
licence's `TradeName`, falling back to `BusinessName` (16 of 309 licences
carry a blank trade name, so the fallback is load-bearing).

EIMS is pinned back to `BusinessName` for the seller's `LegalName`: an
invoice is a MoR tax filing and must carry the legal entity, not the
trade name. It is the only other caller.

apps/edr-freight-api/src/modules/eims/eims-seller-cache.service.ts

@@ -118,7 +118,11 @@ export class EimsSellerCacheService implements OnModuleInit {
         woreda: data.woreda,
       });
       this.cached = {
-        LegalName: data.companyName || undefined,
+        // The *legal* entity name, not the licence's trade name that
+        // `data.companyName` now carries — an EIMS seller is filed under its
+        // registered name.
+        LegalName:
+          companyInfo?.BusinessName?.trim() || data.companyName || undefined,
         Phone: data.mobilePhone || data.regularPhone || undefined,
         Region: geo?.Region,
         Wereda: geo?.Wereda,