✨ 챌린지 완료 유즈케이스 추가

domain/src/main/java/com/whyranoid/domain/usecase/CompleteChallengeUseCase.kt

@@ -0,0 +1,15 @@
+package com.whyranoid.domain.usecase
+
+import com.whyranoid.domain.repository.ChallengeRepository
+import javax.inject.Inject
+
+class CompleteChallengeUseCase @Inject constructor(
+    private val challengeRepository: ChallengeRepository,
+    private val getMyUidUseCase: GetMyUidUseCase
+) {
+    suspend operator fun invoke(challengeId: Int): Result<Unit> {
+        val myId = getMyUidUseCase()
+        return challengeRepository.changeChallengeStatus(challengeId,"C", myId.getOrNull()?.toInt() ?: -1)
+    }
+
+}