feat: improve operations diagnostics and channel management

api/src/dictionaries/dictionaries.controller.ts

@@ -19,6 +19,11 @@ import {
 export class DictionariesController {
   constructor(private readonly dictionaries: DictionariesService) {}
 
+  @Get('administrative-regions')
+  listAdministrativeRegions() {
+    return this.dictionaries.listAdministrativeRegions();
+  }
+
   @Get('phone-segments')
   listPhoneSegments(
     @Query('keyword') keyword?: string,