huge commit for advanced stats feature.

broke data out into its own library.
may be breaking changes with existing plugins

Data/Migrations/Postgresql/20210124170956_UpdateEFMetaToSupportLinkedMeta.cs

@@ -0,0 +1,43 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace Data.Migrations.Postgresql
+{
+    public partial class UpdateEFMetaToSupportLinkedMeta : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "LinkedMetaId",
+                table: "EFMeta",
+                nullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_EFMeta_LinkedMetaId",
+                table: "EFMeta",
+                column: "LinkedMetaId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_EFMeta_EFMeta_LinkedMetaId",
+                table: "EFMeta",
+                column: "LinkedMetaId",
+                principalTable: "EFMeta",
+                principalColumn: "MetaId",
+                onDelete: ReferentialAction.SetNull);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_EFMeta_EFMeta_LinkedMetaId",
+                table: "EFMeta");
+
+            migrationBuilder.DropIndex(
+                name: "IX_EFMeta_LinkedMetaId",
+                table: "EFMeta");
+
+            migrationBuilder.DropColumn(
+                name: "LinkedMetaId",
+                table: "EFMeta");
+        }
+    }
+}