fix(core): Fix issues with JSONL data processing and improve error handling in business record validation

ts/classes.businessrecord.ts

@@ -11,6 +11,9 @@ export class BusinessRecord extends plugins.smartdata.SmartDataDbDoc<
   @plugins.smartdata.svDb()
   data: {
     name?: string;
+    startDate?: string;
+    endDate?: string;
+    status?: 'active' | 'liquidating' | 'closed';
     address?: string;
     postalCode?: string;
     city?: string;
@@ -42,4 +45,11 @@ export class BusinessRecord extends plugins.smartdata.SmartDataDbDoc<
     purpose?: string;
     lastUpdate?: string;
   } = {};
+
+  /**
+   * validates the record against the Handelregister.
+   */
+  public async validate() {
+    if (!this.data.name) throw new Error('Name is required.');
+  }
 }