Added registrar + fixed sign bug in car-body flow

src/claim-request-management/entites/schema/claim-cases.schema.ts

@@ -133,6 +133,9 @@ export class ClaimCase {
   @Prop({ type: [HistoryEventSchema], default: [] })
   history?: HistoryEvent[];
 
+  @Prop({ type: Types.ObjectId, index: true })
+  createdByRegistrarId?: Types.ObjectId;
+
   /**
    * Legacy fields kept optional to simplify progressive migration.
    * If you choose to migrate later, we can remove these.