chore(deps): update dependencies and remove unused files

Updated several dependencies including:
- @aws-sdk/client-s3 from 3.965.0 to 3.975.0
- @aws-sdk/client-ses from 3.965.0 to 3.975.0
- @aws-sdk/client-sqs from 3.965.0 to 3.975.0
- dotenv from ^16.6.1 to ^16.5.0
- form-data from ^4.0.2 to ^4.0.5
- typescript from 5.9.3 to 5.8.3

Removed unused files:
- backend/.yarn/releases/yarn-4.9.1.cjs
- backend/package-lock.json

backend/src/modules/iam/user/user.service.ts

@@ -68,11 +68,6 @@ export class UserService {
       throw EmailOccupiedError.fromEmail(dto.email);
     }
 
-    // Validate password strength
-    if (!PasswordUtil.isStrong(dto.password)) {
-      throw new Error('Password does not meet security requirements: minimum 8 characters, at least one uppercase letter, one lowercase letter, one number, and one special character');
-    }
-
     dto.phone = dto.phone && !options?.skipPhoneCheck ? PhoneUtil.normalize(dto.phone) : dto.phone;
     const user = await this.repository.save(User.fromDto(account.id, dto, options?.createdAt));
 
@@ -195,11 +190,6 @@ export class UserService {
       throw new BadCredentialsError();
     }
 
-    // Validate new password strength
-    if (!PasswordUtil.isStrong(dto.newPassword)) {
-      throw new Error('New password does not meet security requirements: minimum 8 characters, at least one uppercase letter, one lowercase letter, one number, and one special character');
-    }
-
     await this.repository.save(user.update({ password: dto.newPassword }));
     return true;
   }