feat: 발송 상세 로그 조회 API 구현 (#136)

- POST /v1/in/stats/send-log (DDL-02)
- 특정 메시지의 개별 디바이스별 발송 로그 조회
- 플랫폼(iOS/Android/Web), 성공/실패 필터 지원
- Device Include로 디바이스 토큰, 플랫폼 정보 포함

Closes #136

SPMS.API/Controllers/StatsController.cs

@@ -63,6 +63,15 @@ public class StatsController : ControllerBase
         return Ok(ApiResponse<DeviceStatResponseDto>.Success(result, "조회 성공"));
     }
 
+    [HttpPost("send-log")]
+    [SwaggerOperation(Summary = "발송 상세 로그 조회", Description = "특정 메시지의 개별 디바이스별 발송 상세 로그를 조회합니다.")]
+    public async Task<IActionResult> GetSendLogDetailAsync([FromBody] SendLogDetailRequestDto request)
+    {
+        var serviceId = GetServiceId();
+        var result = await _statsService.GetSendLogDetailAsync(serviceId, request);
+        return Ok(ApiResponse<SendLogDetailResponseDto>.Success(result, "조회 성공"));
+    }
+
     private long GetServiceId()
     {
         if (HttpContext.Items.TryGetValue("ServiceId", out var serviceIdObj) && serviceIdObj is long serviceId)

SPMS.Application/DTOs/Stats/SendLogDetailRequestDto.cs

@@ -0,0 +1,23 @@
+using System.ComponentModel.DataAnnotations;
+using System.Text.Json.Serialization;
+
+namespace SPMS.Application.DTOs.Stats;
+
+public class SendLogDetailRequestDto
+{
+    [Required(ErrorMessage = "message_code는 필수입니다.")]
+    [JsonPropertyName("message_code")]
+    public string MessageCode { get; set; } = string.Empty;
+
+    [JsonPropertyName("status")]
+    public string? Status { get; set; }
+
+    [JsonPropertyName("platform")]
+    public string? Platform { get; set; }
+
+    [JsonPropertyName("page")]
+    public int Page { get; set; } = 1;
+
+    [JsonPropertyName("size")]
+    public int Size { get; set; } = 20;
+}

SPMS.Application/DTOs/Stats/SendLogDetailResponseDto.cs

@@ -0,0 +1,34 @@
+using System.Text.Json.Serialization;
+using SPMS.Application.DTOs.Notice;
+
+namespace SPMS.Application.DTOs.Stats;
+
+public class SendLogDetailResponseDto
+{
+    [JsonPropertyName("items")]
+    public List<SendLogDetailItemDto> Items { get; set; } = [];
+
+    [JsonPropertyName("pagination")]
+    public PaginationDto Pagination { get; set; } = new();
+}
+
+public class SendLogDetailItemDto
+{
+    [JsonPropertyName("device_id")]
+    public long DeviceId { get; set; }
+
+    [JsonPropertyName("device_token")]
+    public string DeviceToken { get; set; } = string.Empty;
+
+    [JsonPropertyName("platform")]
+    public string Platform { get; set; } = string.Empty;
+
+    [JsonPropertyName("status")]
+    public string Status { get; set; } = string.Empty;
+
+    [JsonPropertyName("fail_reason")]
+    public string? FailReason { get; set; }
+
+    [JsonPropertyName("sent_at")]
+    public DateTime SentAt { get; set; }
+}

SPMS.Application/Interfaces/IStatsService.cs

@@ -9,4 +9,5 @@ public interface IStatsService
     Task<MessageStatResponseDto> GetMessageStatAsync(long serviceId, MessageStatRequestDto request);
     Task<HourlyStatResponseDto> GetHourlyAsync(long serviceId, HourlyStatRequestDto request);
     Task<DeviceStatResponseDto> GetDeviceStatAsync(long serviceId);
+    Task<SendLogDetailResponseDto> GetSendLogDetailAsync(long serviceId, SendLogDetailRequestDto request);
 }

SPMS.Application/Services/StatsService.cs

@@ -235,6 +235,61 @@ public class StatsService : IStatsService
         };
     }
 
+    public async Task<SendLogDetailResponseDto> GetSendLogDetailAsync(long serviceId, SendLogDetailRequestDto request)
+    {
+        var message = await _messageRepository.GetByMessageCodeAndServiceAsync(request.MessageCode, serviceId);
+        if (message == null)
+            throw new SpmsException(ErrorCodes.MessageNotFound, "존재하지 않는 메시지 코드입니다.", 404);
+
+        PushResult? status = null;
+        if (!string.IsNullOrWhiteSpace(request.Status))
+        {
+            status = request.Status.ToLowerInvariant() switch
+            {
+                "success" => PushResult.Success,
+                "failed" => PushResult.Failed,
+                _ => null
+            };
+        }
+
+        Platform? platform = null;
+        if (!string.IsNullOrWhiteSpace(request.Platform))
+        {
+            platform = request.Platform.ToLowerInvariant() switch
+            {
+                "ios" => Domain.Enums.Platform.iOS,
+                "android" => Domain.Enums.Platform.Android,
+                "web" => Domain.Enums.Platform.Web,
+                _ => null
+            };
+        }
+
+        var (items, totalCount) = await _pushSendLogRepository.GetDetailLogPagedAsync(
+            serviceId, message.Id, request.Page, request.Size, status, platform);
+
+        var totalPages = (int)Math.Ceiling((double)totalCount / request.Size);
+
+        return new SendLogDetailResponseDto
+        {
+            Items = items.Select(l => new SendLogDetailItemDto
+            {
+                DeviceId = l.DeviceId,
+                DeviceToken = l.Device?.DeviceToken ?? string.Empty,
+                Platform = l.Device?.Platform.ToString().ToLowerInvariant() ?? string.Empty,
+                Status = l.Status.ToString().ToLowerInvariant(),
+                FailReason = l.FailReason,
+                SentAt = l.SentAt
+            }).ToList(),
+            Pagination = new DTOs.Notice.PaginationDto
+            {
+                Page = request.Page,
+                Size = request.Size,
+                TotalCount = totalCount,
+                TotalPages = totalPages
+            }
+        };
+    }
+
     private static double CalcCtr(int openCount, int successCount)
     {
         return successCount > 0 ? Math.Round((double)openCount / successCount * 100, 2) : 0;

SPMS.Domain/Interfaces/IPushSendLogRepository.cs

@@ -14,6 +14,9 @@ public interface IPushSendLogRepository : IRepository<PushSendLog>
     Task<List<HourlyStatRaw>> GetHourlyStatsAsync(long serviceId, DateTime startDate, DateTime endDate);
     Task<MessageStatRaw?> GetMessageStatsAsync(long serviceId, long messageId, DateTime? startDate, DateTime? endDate);
     Task<List<MessageDailyStatRaw>> GetMessageDailyStatsAsync(long serviceId, long messageId, DateTime? startDate, DateTime? endDate);
+    Task<(IReadOnlyList<PushSendLog> Items, int TotalCount)> GetDetailLogPagedAsync(
+        long serviceId, long messageId, int page, int size,
+        PushResult? status = null, Platform? platform = null);
 }
 
 public class HourlyStatRaw

SPMS.Infrastructure/Persistence/Repositories/PushSendLogRepository.cs

@@ -86,6 +86,31 @@ public class PushSendLogRepository : Repository<PushSendLog>, IPushSendLogReposi
             .FirstOrDefaultAsync();
     }
 
+    public async Task<(IReadOnlyList<PushSendLog> Items, int TotalCount)> GetDetailLogPagedAsync(
+        long serviceId, long messageId, int page, int size,
+        PushResult? status = null, Platform? platform = null)
+    {
+        var query = _dbSet
+            .Include(l => l.Device)
+            .Where(l => l.ServiceId == serviceId && l.MessageId == messageId);
+
+        if (status.HasValue)
+            query = query.Where(l => l.Status == status.Value);
+
+        if (platform.HasValue)
+            query = query.Where(l => l.Device.Platform == platform.Value);
+
+        var totalCount = await query.CountAsync();
+
+        var items = await query
+            .OrderByDescending(l => l.SentAt)
+            .Skip((page - 1) * size)
+            .Take(size)
+            .ToListAsync();
+
+        return (items, totalCount);
+    }
+
     public async Task<List<MessageDailyStatRaw>> GetMessageDailyStatsAsync(long serviceId, long messageId, DateTime? startDate, DateTime? endDate)
     {
         var query = _dbSet.Where(l => l.ServiceId == serviceId && l.MessageId == messageId);