feat: add choice to etrade fetcher

packages/types/src/freight/etrade.ts

@@ -55,10 +55,24 @@ export interface ETradeCompanyInfo {
     RenewedFrom: string;
     RenewedTo: string;
     BusinessLicensingGroupMain: string | null;
-    SubGroups: string | null;
+    SubGroups: Array<{ Code: number; Description: string }> | null;
   }>;
 }
 
+/**
+ * One business licence held under a TIN. A single owner routinely holds many
+ * (import of vehicles, export of coffee, freight forwarding…), all sharing the
+ * same trade name — the licensed activity is what tells them apart, so that is
+ * what the customer picks by.
+ */
+export interface ETradeBusinessOption {
+  licenceNumber: string;
+  tradeName: string;
+  /** The licensed activities ("Import trade in …"), joined. May be empty. */
+  activity: string;
+  renewedTo: string;
+}
+
 export interface CompanyRegistrationData {
   /**
    * The registered organization name — `ETradeCompanyInfo.BusinessName`, falling
@@ -84,4 +98,11 @@ export interface CompanyRegistrationData {
   managerPhone: string;
   /** True when this TIN is already registered to an existing company. */
   tinTaken?: boolean;
+  /**
+   * Every licence this TIN holds. More than one means the customer has to say
+   * which business they are acting as before the registration data above can be
+   * trusted — it describes whichever licence was selected (the first, by
+   * default).
+   */
+  businesses?: ETradeBusinessOption[];
 }