Phase 1A done

src/db/repositories/consumer.repository.ts

@@ -12,6 +12,10 @@ export class ConsumerRepository {
     return db.select().from(consumers).where(eq(consumers.projectId, projectId));
   }
 
+  async listByCircuitList(circuitListId: string) {
+    return db.select().from(consumers).where(eq(consumers.circuitListId, circuitListId));
+  }
+
   async create(input: CreateConsumerInput) {
     const id = crypto.randomUUID();
     const normalizedName = input.name?.trim() || "Unbenannter Eintrag";