Pack logic cleanup

SVSim.Database/Models/Config/SlotRarityWeights.cs

@@ -0,0 +1,23 @@
+using Microsoft.EntityFrameworkCore;
+
+namespace SVSim.Database.Models.Config;
+
+/// <summary>
+/// Per-rarity weights for a single pack slot. Sum should be ≤ 1.0;
+/// remainder absorbs into Bronze via the PickRarity catch-all band.
+/// <para>
+/// <see cref="Slot"/> is the 1-based slot index as a string (e.g. "8") and is used as the
+/// lookup key in <see cref="PackRateConfig.PerSlot"/>. It is empty/null for the global
+/// <see cref="PackRateConfig.Default"/> entry, which has no slot affiliation.
+/// </para>
+/// </summary>
+[Owned]
+public class SlotRarityWeights
+{
+    /// <summary>1-based slot index (as a string) for entries in PerSlot. Null/empty for the Default entry.</summary>
+    public string? Slot { get; set; }
+    public double Bronze { get; set; }
+    public double Silver { get; set; }
+    public double Gold { get; set; }
+    public double Legendary { get; set; }
+}