Seeding updated

SVSim.Database/Models/MasterPointRankingPeriodEntry.cs

@@ -0,0 +1,18 @@
+using SVSim.Database.Common;
+
+namespace SVSim.Database.Models;
+
+/// <summary>
+/// Monthly Master Point ranking window from /mypage/index data.master_point_ranking_period.
+/// One row per period; the "current" period is fetched by EndTime > now ordering.
+/// </summary>
+public class MasterPointRankingPeriodEntry : BaseEntity<int>
+{
+    public int PeriodNum { get; set; }
+
+    public long NecessaryScore { get; set; }
+
+    public DateTime BeginTime { get; set; }
+
+    public DateTime EndTime { get; set; }
+}