refactor: Repository 인터페이스를 Domain 모듈로 이동

Clean Architecture 원칙에 따라 Repository 패턴을 개선:
- Repository 인터페이스를 Infrastructure에서 Domain으로 이동
- Infrastructure는 Domain 인터페이스를 구현하도록 수정
- Application 레이어가 Domain 인터페이스에만 의존하도록 개선
- ConversationHistory 폴더명을 Conversation으로 변경하여 일관성 확보
- 모든 테스트 코드의 참조 경로 업데이트

변경사항:
- Domain/Repositories/ 인터페이스 생성
- Infrastructure 구현체들이 Domain 인터페이스 참조
- Application 서비스들의 의존성을 Domain으로 변경
- DI 컨테이너 등록 수정
- 테스트 프로젝트 참조 경로 업데이트

Author: ImGdevel

ProjectVG.Application/Services/Character/CharacterService.cs

@@ -1,4 +1,4 @@
-using ProjectVG.Infrastructure.Persistence.Repositories.Characters;
+using ProjectVG.Domain.Repositories;
 using Microsoft.Extensions.Logging;
 using ProjectVG.Application.Models.Character;
 using ProjectVG.Common.Exceptions;

ProjectVG.Application/Services/Conversation/ConversationService.cs

@@ -1,5 +1,5 @@
 using ProjectVG.Domain.Entities.ConversationHistorys;
-using ProjectVG.Infrastructure.Persistence.Repositories.Conversation;
+using ProjectVG.Domain.Repositories;
 using Microsoft.Extensions.Logging;
 using ProjectVG.Common.Exceptions;
 using ProjectVG.Common.Constants;

ProjectVG.Application/Services/Credit/CreditManagementService.cs

@@ -1,8 +1,7 @@
 using Microsoft.EntityFrameworkCore;
 using ProjectVG.Domain.Entities.Credits;
 using ProjectVG.Infrastructure.Persistence.EfCore;
-using ProjectVG.Infrastructure.Persistence.Repositories.Credit;
-using ProjectVG.Infrastructure.Persistence.Repositories.Users;
+using ProjectVG.Domain.Repositories;
 
 namespace ProjectVG.Application.Services.Credit
 {

ProjectVG.Application/Services/User/UserService.cs

@@ -1,7 +1,7 @@
 using ProjectVG.Application.Models.User;
 using ProjectVG.Common.Utils;
 using ProjectVG.Domain.Entities.Users;
-using ProjectVG.Infrastructure.Persistence.Repositories.Users;
+using ProjectVG.Domain.Repositories;
 
 namespace ProjectVG.Application.Services.Users
 {

ProjectVG.Domain/Entities/ConversationHistory/ChatRole.cs renamed to ProjectVG.Domain/Entities/Conversation/ChatRole.cs

@@ -1,6 +1,6 @@
 using ProjectVG.Domain.Entities.Characters;
 
-namespace ProjectVG.Infrastructure.Persistence.Repositories.Characters
+namespace ProjectVG.Domain.Repositories
 {
     public interface ICharacterRepository
     {
@@ -12,4 +12,4 @@ public interface ICharacterRepository
         Task<IEnumerable<Character>> GetByUserIdAsync(Guid userId);
         Task<IEnumerable<Character>> GetPublicCharactersAsync();
     }
-} 
+}

ProjectVG.Domain/Entities/ConversationHistory/ConversationHistory.cs renamed to ProjectVG.Domain/Entities/Conversation/ConversationHistory.cs

@@ -0,0 +1,14 @@
+using ProjectVG.Domain.Entities.ConversationHistorys;
+
+namespace ProjectVG.Domain.Repositories
+{
+    public interface IConversationRepository
+    {
+        Task<IEnumerable<ConversationHistory>> GetConversationHistoryAsync(Guid userId, Guid characterId, int page = 1, int pageSize = 10);
+        Task<ConversationHistory> AddAsync(ConversationHistory conversationHistory);
+        Task DeleteConversationAsync(Guid userId, Guid characterId);
+        Task<int> GetMessageCountAsync(Guid userId, Guid characterId);
+        Task<IEnumerable<ConversationHistory>> GetByConversationIdAsync(string conversationId);
+        Task DeleteMessageAsync(Guid messageId);
+    }
+}

ProjectVG.Infrastructure/Persistence/Repositories/Character/ICharacterRepository.cs renamed to ProjectVG.Domain/Repositories/ICharacterRepository.cs

@@ -0,0 +1,24 @@
+using ProjectVG.Domain.Entities.Credits;
+
+namespace ProjectVG.Domain.Repositories
+{
+    public interface ICreditTransactionRepository
+    {
+        Task<CreditTransaction> CreateAsync(CreditTransaction transaction);
+        Task<CreditTransaction?> GetByTransactionIdAsync(string transactionId);
+        Task<(List<CreditTransaction> Transactions, int TotalCount)> GetUserTransactionsAsync(
+            Guid userId, 
+            int pageNumber, 
+            int pageSize,
+            CreditTransactionType? transactionType = null);
+        Task<decimal> GetUserTransactionSumAsync(
+            Guid userId, 
+            DateTime startDate, 
+            DateTime endDate,
+            CreditTransactionType? transactionType = null);
+        Task<List<CreditTransaction>> GetByRelatedEntityAsync(string relatedEntityType, string relatedEntityId);
+        Task<List<CreditTransaction>> GetBySourceAsync(Guid userId, string source, int? limit = null);
+        Task<bool> TransactionExistsAsync(string transactionId);
+        Task<List<CreditTransaction>> GetRecentTransactionsAsync(Guid userId, int count = 10);
+    }
+}

ProjectVG.Domain/Repositories/IConversationRepository.cs

@@ -1,6 +1,6 @@
 using ProjectVG.Domain.Entities.Users;
 
-namespace ProjectVG.Infrastructure.Persistence.Repositories.Users
+namespace ProjectVG.Domain.Repositories
 {
     public interface IUserRepository
     {
@@ -15,4 +15,4 @@ public interface IUserRepository
         Task<User> UpdateAsync(User user);
         Task DeleteAsync(Guid id);
     }
-} 
+}