feat(pack): persist daily_free_gacha_count on PackChildGachaEntry

SVSim.Database/Models/PackChildGachaEntry.cs

@@ -21,6 +21,7 @@ public class PackChildGachaEntry
     public bool IsDailySingle { get; set; }
     public int OverrideIncreaseGachaPoint { get; set; }
     public int PurchaseLimitCount { get; set; }
+    public int DailyFreeGachaCount { get; set; }
     public int? FreeGachaCampaignId { get; set; }
     public string? CampaignName { get; set; }
 }