Sync a large table with API

[oleg]

Ok, I actually looked more into this, and while the limit for requests is 2 MB, there is a limit of 85 KB for any given row. This is in place to make sure any one else editing the doc freezes from large row updates. We’ll update the error message to make it clearer, but @Dalmo_Mendonca’s suggestion of splitting up columns is the recommended path if you need to insert large cells.