Fix DbContext configuration nightmares.

Thanks to julian figuring out IDesignTimeDbContextFactory exists in #6327.

All this DbContext configuration and options setup stuff is insane. Microsoft should be absolutely ashamed for coming up with this load of garbage.

Content.Server.Database/DesignTimeContextFactories.cs

@@ -0,0 +1,25 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+// ReSharper disable UnusedType.Global
+
+namespace Content.Server.Database;
+
+public sealed class DesignTimeContextFactoryPostgres : IDesignTimeDbContextFactory<PostgresServerDbContext>
+{
+    public PostgresServerDbContext CreateDbContext(string[] args)
+    {
+        var optionsBuilder = new DbContextOptionsBuilder<PostgresServerDbContext>();
+        optionsBuilder.UseNpgsql(args[0]);
+        return new PostgresServerDbContext(optionsBuilder.Options);
+    }
+}
+
+public sealed class DesignTimeContextFactorySqlite : IDesignTimeDbContextFactory<SqliteServerDbContext>
+{
+    public SqliteServerDbContext CreateDbContext(string[] args)
+    {
+        var optionsBuilder = new DbContextOptionsBuilder<SqliteServerDbContext>();
+        optionsBuilder.UseSqlite(args[0]);
+        return new SqliteServerDbContext(optionsBuilder.Options);
+    }
+}