어드민 이메일 검색 시 비활성 유저도 포함하고 email 인덱스 추가

- findAllByEmailIgnoreCaseAndActiveTrue → findAllByEmailIgnoreCase
- User.email에 sparse 인덱스 추가 (auto-index-creation으로 자동 생성)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: eastshine2741

core/src/main/kotlin/users/data/User.kt

@@ -10,6 +10,7 @@ import java.time.LocalDateTime
 data class User(
     @Id
     val id: String? = null,
+    @Indexed(sparse = true)
     var email: String?,
     @Indexed(unique = true, sparse = true)
     var nickname: String,

core/src/main/kotlin/users/repository/UserRepository.kt

@@ -34,7 +34,7 @@ interface UserRepository : CoroutineCrudRepository<User, String> {
 
     suspend fun findByEmailIgnoreCaseAndIsEmailVerifiedTrueAndActiveTrue(email: String): User?
 
-    suspend fun findAllByEmailIgnoreCaseAndActiveTrue(email: String): List<User>
+    suspend fun findAllByEmailIgnoreCase(email: String): List<User>
 
     suspend fun existsByCredentialFbIdAndActiveTrue(fbId: String): Boolean
 

core/src/main/kotlin/users/service/UserService.kt

@@ -605,7 +605,7 @@ class UserServiceImpl(
         redisTemplate.delete(RESET_PASSWORD_CODE_PREFIX + user.id).subscribe()
     }
 
-    override suspend fun getUsersByEmail(email: String): List<User> = userRepository.findAllByEmailIgnoreCaseAndActiveTrue(email)
+    override suspend fun getUsersByEmail(email: String): List<User> = userRepository.findAllByEmailIgnoreCase(email)
 
     private suspend fun saveNewVerificationValue(
         email: String,