Initial commit: Predictalytics solution

Clean Architecture .NET 8 solution (Domain/Application/Infrastructure/Api/Worker/WinFormsHost)
for analyzing Polymarket traders for copytrading/strategy-replication candidates.

Includes EF Core InitialBaseline migration and DB secrets removed from source/config
in preparation for version control.

src/Predictalytics.Domain/Entities/AnalyticsEntities.cs

@@ -0,0 +1,42 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Predictalytics.Domain.Entities;
+
+public class TraderAnalytics
+{
+    [Key, ForeignKey("Trader")]
+    public int TraderId { get; set; }
+
+    public DateTime LastCalculatedAt { get; set; } = DateTime.UtcNow;
+
+    public decimal OverallPnL { get; set; }
+    public decimal OverallWinRate { get; set; }
+
+    public decimal PnL30d { get; set; }
+    public decimal WinRate30d { get; set; }
+
+    public decimal PnL7d { get; set; }
+    public decimal WinRate7d { get; set; }
+
+    public decimal PnL24h { get; set; }
+    public decimal WinRate24h { get; set; }
+
+    // Navigation
+    public virtual Trader Trader { get; set; } = null!;
+}
+
+public class MarketAnalytics
+{
+    [Key, ForeignKey("Market")]
+    public int MarketId { get; set; }
+
+    public DateTime LastCalculatedAt { get; set; } = DateTime.UtcNow;
+
+    public decimal BotActivityScore { get; set; }
+    public int UniqueTradersCount { get; set; }
+    public decimal AverageTradeSize { get; set; }
+
+    // Navigation
+    public virtual Market Market { get; set; } = null!;
+}