add script to prune designer files from migrations, add README with acknowledgements

Foxnouns.Backend/Database/Migrations/20240528125310_AddApplications.cs

@@ -1,10 +1,13 @@
 using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Infrastructure;
 
 #nullable disable
 
 namespace Foxnouns.Backend.Database.Migrations
 {
     /// <inheritdoc />
+    [DbContext(typeof(DatabaseContext))]
+    [Migration("20240528125310_AddApplications")]
     public partial class AddApplications : Migration
     {
         /// <inheritdoc />