fix: DEBT-027 - schedule trade status polling/settlement job

PollTradeStatusHandler and ConfirmSettlementHandler were fully
implemented and registered in DI, but nothing in the running
application ever called them - no endpoint, no Hangfire job. A trade
submitted via POST /trades could reach Submitted and never progress:
KIS fills and settlement confirmations were never picked up. Same
class of gap as DEBT-026 (a complete handler with no caller).

Adds TradeStatusPollingJob, a Hangfire recurring job (every 2 minutes,
q-customer-sla queue) that polls Submitted/Accepted/PartiallyFilled
trades via PollTradeStatusHandler, then confirms settlement for
FullyFilled trades via ConfirmSettlementHandler. Registered in
Program.cs alongside the other recurring jobs.

dotnet build KArtSell.sln -c Release: clean. No dedicated test added
(thin orchestration over already-covered handlers; a fake
IKisTradeExecutionService/ITradeSql test double would be a new pattern
not used elsewhere in this codebase) and not run against a live
database or KIS - see TECH_DEBT_REGISTER.md DEBT-027.

Also corrected WBS_PROGRESS_TRACKER.csv's AEG-VS-28-01 row: the
trade-execution frontend UI agent actually succeeded on retry (it had
previously failed on the session spend limit) - the row still said
"failed, not resumed" from before the retry completed.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/KArtSell.Host/Jobs/TradeStatusPollingJob.cs

@@ -0,0 +1,112 @@
+using Hangfire;
+using KArtSell.Modules.ModelOperations.TradeExecution;
+using Microsoft.Extensions.Logging;
+
+namespace KArtSell.Host.Jobs;
+
+/// <summary>
+/// Polls KIS for status on trades that have been submitted but haven't reached a terminal state,
+/// and confirms settlement for trades that have fully filled.
+///
+/// DEBT-027: before this job existed, PollTradeStatusHandler and ConfirmSettlementHandler were
+/// registered in DI and fully implemented, but nothing in the running application ever invoked
+/// them — no endpoint, no scheduled job. A trade could reach Submitted via POST /trades and never
+/// progress any further; the same class of gap DEBT-026 found and fixed for the approval
+/// workflow's Draft-&gt;Proposed transition.
+/// </summary>
+public sealed class TradeStatusPollingJob(
+    ITradeSql sql,
+    PollTradeStatusHandler pollHandler,
+    ConfirmSettlementHandler settlementHandler,
+    ILogger<TradeStatusPollingJob> logger)
+{
+    private static readonly TradeStatus[] PollableStatuses =
+        [TradeStatus.Submitted, TradeStatus.Accepted, TradeStatus.PartiallyFilled];
+
+    private static readonly Action<ILogger, int, Exception?> LogPolled =
+        LoggerMessage.Define<int>(
+            LogLevel.Information,
+            new EventId(1, nameof(LogPolled)),
+            "Trade status polling processed {TradeCount} non-terminal trades.");
+
+    private static readonly Action<ILogger, Guid, Exception?> LogPollError =
+        LoggerMessage.Define<Guid>(
+            LogLevel.Error,
+            new EventId(2, nameof(LogPollError)),
+            "Failed to poll trade status for {TradeId}");
+
+    private static readonly Action<ILogger, int, Exception?> LogSettled =
+        LoggerMessage.Define<int>(
+            LogLevel.Information,
+            new EventId(3, nameof(LogSettled)),
+            "Trade settlement confirmation processed {TradeCount} fully-filled trades.");
+
+    private static readonly Action<ILogger, Guid, Exception?> LogSettleError =
+        LoggerMessage.Define<Guid>(
+            LogLevel.Error,
+            new EventId(4, nameof(LogSettleError)),
+            "Failed to confirm settlement for {TradeId}");
+
+    [Queue("q-customer-sla")]
+    [DisableConcurrentExecution(timeoutInSeconds: 120)]
+    [AutomaticRetry(Attempts = 3, OnAttemptsExceeded = AttemptsExceededAction.Fail)]
+    public async Task ExecuteAsync(CancellationToken ct = default)
+    {
+        var polledCount = 0;
+        foreach (var status in PollableStatuses)
+        {
+            var trades = await sql.GetTradesByStatusAsync(status, Guid.NewGuid(), ct);
+            foreach (var trade in trades)
+            {
+                if (string.IsNullOrEmpty(trade.KisOrderId))
+                {
+                    continue;
+                }
+
+                try
+                {
+                    await pollHandler.HandleAsync(new PollTradeStatusCommand
+                    {
+                        TradeId = trade.Id,
+                        KisOrderId = trade.KisOrderId,
+                        CorrelationId = trade.CorrelationId
+                    }, ct);
+                    polledCount++;
+                }
+                catch (Exception ex)
+                {
+                    LogPollError(logger, trade.Id, ex);
+                }
+            }
+        }
+
+        LogPolled(logger, polledCount, null);
+
+        var filledTrades = await sql.GetTradesByStatusAsync(TradeStatus.FullyFilled, Guid.NewGuid(), ct);
+        var settledCount = 0;
+        foreach (var trade in filledTrades)
+        {
+            if (string.IsNullOrEmpty(trade.KisOrderId))
+            {
+                continue;
+            }
+
+            try
+            {
+                await settlementHandler.HandleAsync(new ConfirmSettlementCommand
+                {
+                    TradeId = trade.Id,
+                    KisOrderId = trade.KisOrderId,
+                    CorrelationId = trade.CorrelationId
+                }, ct);
+                settledCount++;
+            }
+            catch (Exception ex)
+            {
+                LogSettleError(logger, trade.Id, ex);
+            }
+        }
+
+        LogSettled(logger, settledCount, null);
+    }
+}

src/KArtSell.Host/Program.cs

@@ -200,6 +200,7 @@ builder.Services.AddScoped<KArtSell.Modules.ModelOperations.TradeExecution.ITrad
 builder.Services.AddScoped<KArtSell.Modules.ModelOperations.TradeExecution.SubmitTradeHandler>();
 builder.Services.AddScoped<KArtSell.Modules.ModelOperations.TradeExecution.PollTradeStatusHandler>();
 builder.Services.AddScoped<KArtSell.Modules.ModelOperations.TradeExecution.ConfirmSettlementHandler>();
+builder.Services.AddScoped<KArtSell.Host.Jobs.TradeStatusPollingJob>();
 
 // Portfolio Reconciliation (VS-14)
 builder.Services.AddScoped<KArtSell.Modules.ModelOperations.PortfolioReconciliation.IReconciliationRepository, KArtSell.Modules.ModelOperations.PortfolioReconciliation.ReconciliationSql>();
@@ -397,6 +398,8 @@ try { RecurringJob.AddOrUpdate<OpenDartDailyBatchJob>("opendart-daily-batch", jo
 try { RecurringJob.AddOrUpdate<GenerateDailyRecommendationJob>("daily-recommendation", job => job.ExecuteAsync(CancellationToken.None), "0 9 * * *", new RecurringJobOptions { TimeZone = kstTimeZone }); logger.LogInformation("✅ daily-recommendation registered"); } catch (Exception ex) { logger.LogWarning(ex, "⚠️ daily-recommendation error"); }
 try { RecurringJob.AddOrUpdate<GenerateWeeklyRecommendationJob>("weekly-recommendation", job => job.ExecuteAsync(CancellationToken.None), "0 9 * * 6", new RecurringJobOptions { TimeZone = kstTimeZone }); logger.LogInformation("✅ weekly-recommendation registered"); } catch (Exception ex) { logger.LogWarning(ex, "⚠️ weekly-recommendation error"); }
 try { RecurringJob.AddOrUpdate<GenerateMonthlyRecommendationJob>("monthly-recommendation", job => job.ExecuteAsync(CancellationToken.None), "0 9 1 * *", new RecurringJobOptions { TimeZone = kstTimeZone }); logger.LogInformation("✅ monthly-recommendation registered"); } catch (Exception ex) { logger.LogWarning(ex, "⚠️ monthly-recommendation error"); }
+// DEBT-027: without this, PollTradeStatusHandler/ConfirmSettlementHandler were reachable via DI but never invoked by anything.
+try { RecurringJob.AddOrUpdate<KArtSell.Host.Jobs.TradeStatusPollingJob>("trade-status-polling", job => job.ExecuteAsync(CancellationToken.None), "*/2 * * * *", new RecurringJobOptions { TimeZone = TimeZoneInfo.Utc }); logger.LogInformation("✅ trade-status-polling registered"); } catch (Exception ex) { logger.LogWarning(ex, "⚠️ trade-status-polling error"); }
 
 logger.LogInformation("🎯 Hangfire background jobs initialization complete");