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.Worker/Services/TradeRetentionWorker.cs

@@ -69,7 +69,7 @@ public class TradeRetentionWorker : BackgroundService
             return;
         }
 
-        var retentionDays = _config.GetValue("RetentionSettings:RetentionDays", 90);
+        var retentionDays = _config.GetValue("RetentionSettings:RetentionDays", 180);
         var compactionDays = _config.GetValue("RetentionSettings:CompactionDays", 14);
 
         _logger.LogInformation("🧹 TradeRetentionWorker: Starting optimization. RetentionDays={Retention}, CompactionDays={Compaction}",
@@ -83,13 +83,13 @@ public class TradeRetentionWorker : BackgroundService
         _logger.LogInformation("Pruning trades older than {Cutoff}...", retentionCutoff);
         
         var deletedTrades = await db.Trades
-            .Where(t => t.ExecutedAt < retentionCutoff && !t.Trader.WatchlistEntries.Any())
+            .Where(t => t.ExecutedAt < retentionCutoff && !t.Trader.WatchlistEntries.Any() && t.Trader.IngestMode == IngestMode.Full)
             .Select(t => new { t.TraderId, t.MarketOutcomeId })
             .Distinct()
             .ToListAsync(ct);
 
         var deletedCount = await db.Trades
-            .Where(t => t.ExecutedAt < retentionCutoff && !t.Trader.WatchlistEntries.Any())
+            .Where(t => t.ExecutedAt < retentionCutoff && !t.Trader.WatchlistEntries.Any() && t.Trader.IngestMode == IngestMode.Full)
             .ExecuteDeleteAsync(ct);
 
         if (deletedCount > 0 && deletedTrades.Any())
@@ -217,7 +217,8 @@ public class TradeRetentionWorker : BackgroundService
                     Size = totalSize,
                     Amount = totalAmount,
                     ExecutedAt = date.AddHours(12), // Set to noon of that day
-                    TransactionHash = null
+                    TransactionHash = null,
+                    AggregatedCount = list.Sum(t => t.AggregatedCount ?? 1)
                 };
 
                 // Remove the individual trades