fix: explicitly return * in Patch queries

This is needed because the API takes the object from the database query to return to the user

PluralKit.Core/Database/Repository/ModelRepository.Member.cs

@@ -64,7 +64,7 @@ namespace PluralKit.Core
         {
             _logger.Information("Updated {MemberId}: {@MemberPatch}", id, patch);
             var query = patch.Apply(new Query("members").Where("id", id));
-            return _db.QueryFirst<PKMember>(conn, query);
+            return _db.QueryFirst<PKMember>(conn, query, extraSql: "returning *");
         }
 
         public Task DeleteMember(MemberId id)