fix(ci): resolve duplicate assembly attributes and flaky tests for deploy-prod and collection orchestrator

src/dotnet/QuantEngine.Application/Services/KisDataCollectionOrchestrator.cs

@@ -20,6 +20,8 @@ public class KisDataCollectionOrchestrator : ICollectionOrchestrator
     private readonly ILogger<KisDataCollectionOrchestrator> _logger;
     private readonly IRuntimeAuditTrailService _auditTrail;
 
+    public Func<DateTime> UtcNowProvider { get; set; } = () => DateTime.UtcNow;
+
     public KisDataCollectionOrchestrator(
         IKisApiClient kisApiClient,
         ICollectionWriteRepository repository,
@@ -70,7 +72,7 @@ public class KisDataCollectionOrchestrator : ICollectionOrchestrator
                     if (IsMarketClosed())
                     {
                         var latest = await _readRepository.GetLatestSnapshotsForTickerAsync(ticker, 1);
-                        var todayPrefix = DateTime.UtcNow.AddHours(9).ToString("yyyy-MM-dd");
+                        var todayPrefix = UtcNowProvider().AddHours(9).ToString("yyyy-MM-dd");
                         if (latest.Count > 0 && latest[0].CapturedAt.StartsWith(todayPrefix))
                         {
                             cachedSnapshot = latest[0];
@@ -111,7 +113,7 @@ public class KisDataCollectionOrchestrator : ICollectionOrchestrator
                     // Persist daily OHLCV bars
                     try
                     {
-                        var today = DateTime.UtcNow.AddHours(9).ToString("yyyyMMdd");
+                        var today = UtcNowProvider().AddHours(9).ToString("yyyyMMdd");
                         var chartResult = await _kisApiClient.GetDailyItemChartPriceAsync(ticker, today, today, "D", account);
                         if (chartResult.TryGetValue("output2", out var output2Obj) && output2Obj is JsonElement output2Elem && output2Elem.ValueKind == JsonValueKind.Array)
                         {
@@ -307,10 +309,10 @@ public class KisDataCollectionOrchestrator : ICollectionOrchestrator
         return Path.Combine(Path.GetTempPath(), "kis_dotnet_collection_v1.json");
     }
 
-    private static bool IsMarketClosed()
+    private bool IsMarketClosed()
     {
         // KST Time conversion (UTC+9)
-        var kst = DateTime.UtcNow.AddHours(9);
+        var kst = UtcNowProvider().AddHours(9);
         
         // Weekend check
         if (kst.DayOfWeek == DayOfWeek.Saturday || kst.DayOfWeek == DayOfWeek.Sunday)