add total ranked client number for stats pages

Data/Migrations/MySql/20220609135128_AddIndexToEFRankingHistoryCreatedDatetime.cs

@@ -0,0 +1,24 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Data.Migrations.MySql
+{
+    public partial class AddIndexToEFRankingHistoryCreatedDatetime : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateIndex(
+                name: "IX_EFClientRankingHistory_CreatedDateTime",
+                table: "EFClientRankingHistory",
+                column: "CreatedDateTime");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_EFClientRankingHistory_CreatedDateTime",
+                table: "EFClientRankingHistory");
+        }
+    }
+}

Data/Migrations/MySql/MySqlDatabaseContextModelSnapshot.cs

@@ -456,6 +456,8 @@ namespace Data.Migrations.MySql
 
                     b.HasIndex("ClientId");
 
+                    b.HasIndex("CreatedDateTime");
+
                     b.HasIndex("Ranking");
 
                     b.HasIndex("ServerId");