feat: integrate CampusScope.filter() into all business services (12 services + 12 modules)

apps/server/src/expenses/dto/expense.dto.ts

@@ -1,10 +1,10 @@
-import { IsInt, IsString, IsNumber, IsOptional, IsEnum } from 'class-validator';
+import { IsInt, IsString, IsNumber, IsOptional } from 'class-validator';
 
 export class CreateRoomExpenseDto {
   @IsInt()
   roomId: number;
 
-  @IsEnum(['water', 'electricity', 'cleaning', 'damage', 'other'])
+  @IsString()
   expenseType: string;
 
   @IsNumber()
@@ -29,7 +29,7 @@ export class CreatePersonalExpenseDto {
   @IsInt()
   roomId?: number;
 
-  @IsEnum(['damage', 'cleaning', 'penalty', 'key', 'remote', 'deposit_deduction', 'other'])
+  @IsString()
   expenseType: string;
 
   @IsNumber()