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/ValueObjects/PriorityScore.cs

@@ -0,0 +1,36 @@
+using Predictalytics.Domain.Enums;
+
+namespace Predictalytics.Domain.ValueObjects;
+
+/// <summary>
+/// Encapsulates a trader's calculated priority score with all component scores.
+/// </summary>
+public record PriorityScore(
+    decimal ActivityScore,
+    decimal QualityScore,
+    decimal VolumeScore,
+    decimal TimingScore,
+    decimal CombinedScore,
+    int? ManualOverride = null
+)
+{
+    /// <summary>
+    /// The effective score, considering any manual override.
+    /// </summary>
+    public decimal EffectiveScore => ManualOverride.HasValue
+        ? ManualOverride.Value
+        : CombinedScore;
+
+    /// <summary>
+    /// Determine tier based on effective score.
+    /// </summary>
+    public TraderTier DetermineTier() => EffectiveScore switch
+    {
+        >= 90 => TraderTier.Diamond,
+        >= 75 => TraderTier.Platinum,
+        >= 60 => TraderTier.Gold,
+        >= 40 => TraderTier.Silver,
+        >= 20 => TraderTier.Bronze,
+        _ => TraderTier.Unknown
+    };
+}