feat: KIS Open API 연동 및 DataCollectionService 구현

- C# 기반의 DataCollectionService 클래스 구현

- 기존의 파이썬 스크립트 실행 방식을 대체하고 KIS API 클라이언트를 직접 사용하여 주식 시세, 호가, 공매도 정보 수집

- CollectionEndpoints에 비동기 수집 요청 처리 통합 및 Program.cs에 서비스 DI 등록

src/dotnet/QuantEngine.Web/Endpoints/CollectionEndpoints.cs

@@ -1,5 +1,5 @@
 using QuantEngine.Core.Interfaces;
-using System.Diagnostics;
+using QuantEngine.Application.Services;
 
 namespace QuantEngine.Web.Endpoints;
 
@@ -108,51 +108,30 @@ public static class CollectionEndpoints
         }
     }
 
-    private static async Task<IResult> StartCollectionRun(ICollectionRepository repo, ILogger<Program> logger)
+    private static async Task<IResult> StartCollectionRun(
+        DataCollectionService collectionService,
+        HttpRequest request,
+        ILogger<Program> logger)
     {
         try
         {
             var runId = Guid.NewGuid().ToString("N");
             var now = DateTime.UtcNow.ToString("o");
 
-            var run = new CollectionRunRecord(
-                RunId: runId,
-                Status: "running",
-                StartedAt: now,
-                FinishedAt: null,
-                TotalSnapshots: null,
-                TotalErrors: null,
-                UpdatedAt: now
-            );
+            var body = await request.ReadAsAsync<CollectionRunRequest>();
+            var account = body?.Account ?? "real";
+            var tickers = body?.Tickers ?? new List<string> { "005930", "000660" };
 
-            await repo.SaveRunAsync(run);
-
-            // Temp: Invoke Python subprocess for actual collection
+            // Trigger async collection (fire-and-forget)
             _ = Task.Run(async () =>
             {
                 try
                 {
-                    var process = new Process
-                    {
-                        StartInfo = new ProcessStartInfo
-                        {
-                            FileName = "python",
-                            Arguments = "tools/run_kis_data_collection_v1.py --input-json GatherTradingData.json --sqlite-db src/quant_engine/kis_data_collection.db --kis-account real",
-                            UseShellExecute = false,
-                            RedirectStandardOutput = true,
-                            CreateNoWindow = true
-                        }
-                    };
-
-                    process.Start();
-                    await process.WaitForExitAsync();
-
-                    await repo.UpdateRunStatusAsync(runId, "completed", DateTime.UtcNow.ToString("o"), 0, 0);
+                    await collectionService.RunCollectionAsync(runId, account, tickers);
                 }
                 catch (Exception ex)
                 {
-                    logger.LogError(ex, $"Collection run {runId} failed");
-                    await repo.UpdateRunStatusAsync(runId, "failed", DateTime.UtcNow.ToString("o"), null, null);
+                    logger.LogError(ex, "Collection run {RunId} failed", runId);
                 }
             });
 
@@ -160,12 +139,20 @@ public static class CollectionEndpoints
             {
                 runId,
                 status = "running",
-                startedAt = now
+                startedAt = now,
+                tickerCount = tickers.Count
             });
         }
-        catch
+        catch (Exception ex)
         {
+            logger.LogError(ex, "Failed to start collection run");
             return Results.StatusCode(500);
         }
     }
+
+    private class CollectionRunRequest
+    {
+        public string? Account { get; set; }
+        public List<string>? Tickers { get; set; }
+    }
 }