init efcore

BlueLaminate/BlueLaminate.EFCore/Entities/SkinInstance.cs

@@ -0,0 +1,20 @@
+namespace BlueLaminate.EFCore.Entities;
+
+public class SkinInstance
+{
+    public int Id { get; set; }
+    public int SkinId { get; set; }
+    public Skin Skin { get; set; } = null!;
+    public int ConditionId { get; set; }
+    public SkinCondition Condition { get; set; } = null!;
+
+    // FloatValue + PaintSeed form a stable fingerprint across trades; the Steam
+    // asset_id changes on every trade but these do not.
+    public decimal FloatValue { get; set; }
+    public string PaintSeed { get; set; } = null!;
+    public bool StatTrak { get; set; }
+    public bool Souvenir { get; set; }
+    public DateTimeOffset FirstSeenAt { get; set; }
+
+    public ICollection<InventoryItem> InventoryItems { get; set; } = new List<InventoryItem>();
+}