feat: implement Part D and E from FIXPLAN

- D1/D2/D2c: Added TraderTraits entity, TraderTraitCalculator, Market Return Metrics (MedianWin, AvgWin, etc.), and trait filters
- D3: Implemented HF-Trader Tiering via IngestMode (Full, Aggregated, SnapshotOnly) and updated TradeHistoryWorker to respect tiers
- E1-E5: Added MasterStatus to Trader, TraderWindowMetrics for rolling analytics, Fingerprint metrics (PriceBandProfile, P50/P90), Copyability aggregates (Volume, Drift, Edge)
- E6: Implemented GET /api/traders/{id}/profile and GET /api/traders/correlation
- Replaced FIXPLAN-2026-07-09.md with FIXPLAN-TODO.md and FIXPLAN-DONE.md
- Cleaned up API docs and plan to use generic terms (removed hardcoded PolyTrader references)
- Added respective EF Core Migrations

src/Predictalytics.Application.Tests/Services/PositionPnLEngineTests.cs

@@ -833,4 +833,52 @@ public class PositionPnLEngineTests
                 $"Trades30d ({analytics.Trades30d}) must never exceed TotalTrades ({trader.TotalTrades})");
         }
     }
+
+    [Fact]
+    public async Task RecalculateTraderPositionsAsync_SumsAggregatedCountForTotalTrades()
+    {
+        // Arrange
+        var dbName = Guid.NewGuid().ToString();
+        using (var db = CreateDbContext(dbName))
+        {
+            var trader = new Trader { Id = 1, PlatformUserId = "0x1", DisplayName = "Trader 1", TotalTrades = 0 };
+            var market = new Market { Id = 10, PlatformMarketId = 1L, Question = "Q?" };
+            market.Outcomes.Add(new MarketOutcome { Id = 100, MarketId = 10, Label = "Yes", TokenId = "t100", CurrentPrice = 0.50m });
+            db.Traders.Add(trader);
+            db.Markets.Add(market);
+
+            db.Trades.Add(new Trade
+            {
+                Id = 10, TraderId = 1, DbMarketId = 10, MarketOutcomeId = 100,
+                Side = TradeSide.Buy, Price = 0.40m, Size = 100m, Amount = 40m,
+                ExecutedAt = DateTime.UtcNow.AddDays(-2),
+                AggregatedCount = 5 // Represents 5 trades
+            });
+            db.Trades.Add(new Trade
+            {
+                Id = 11, TraderId = 1, DbMarketId = 10, MarketOutcomeId = 100,
+                Side = TradeSide.Sell, Price = 0.50m, Size = 50m, Amount = 25m,
+                ExecutedAt = DateTime.UtcNow.AddDays(-1),
+                AggregatedCount = null // Represents 1 trade
+            });
+            await db.SaveChangesAsync();
+        }
+
+        // Act
+        using (var db = CreateDbContext(dbName))
+        {
+            var pnlEngine = new PositionPnLEngine(db, NullLogger<PositionPnLEngine>.Instance);
+            await pnlEngine.RecalculateTraderPositionsAsync(1);
+        }
+
+        // Assert
+        using (var db = CreateDbContext(dbName))
+        {
+            var trader = await db.Traders.SingleAsync(t => t.Id == 1);
+            Assert.Equal(6, trader.TotalTrades); // 5 + 1
+
+            var analytics = await db.TraderAnalytics.SingleAsync(a => a.TraderId == 1);
+            Assert.Equal(6, analytics.Trades30d);
+        }
+    }
 }