Log server ID in connection logs table (#21911)

Content.Server.Database/Migrations/Postgres/20231126234054_ConnectionLogServer.cs

@@ -0,0 +1,55 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Content.Server.Database.Migrations.Postgres
+{
+    /// <inheritdoc />
+    public partial class ConnectionLogServer : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "server_id",
+                table: "connection_log",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0);
+
+            // Note: EF Core automatically makes indexes for all FKs.
+            // That's really dumb, and there's no simple way to disable this.
+            // So we drop the index creation command from the migration here,
+            // as we don't want this index:
+
+            // migrationBuilder.CreateIndex(
+            //     name: "IX_connection_log_server_id",
+            //     table: "connection_log",
+            //     column: "server_id");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_connection_log_server_server_id",
+                table: "connection_log",
+                column: "server_id",
+                principalTable: "server",
+                principalColumn: "server_id",
+                onDelete: ReferentialAction.SetNull);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_connection_log_server_server_id",
+                table: "connection_log");
+
+            // migrationBuilder.DropIndex(
+            //     name: "IX_connection_log_server_id",
+            //     table: "connection_log");
+
+            migrationBuilder.DropColumn(
+                name: "server_id",
+                table: "connection_log");
+        }
+    }
+}