Set many table cell values

Apply up to 1000 manual cell edits in ONE transaction, then recompute their downstream formula cells: inline when the scope is small (see recomputed_column_ids), otherwise via a SINGLE cell-edited run covering all of them. The endpoint that makes a grid paste one request instead of N. A null value clears that cell. All-or-nothing: every column and value is validated before anything is written, so a formula column or a type mismatch anywhere rejects the whole batch and writes nothing. Same-value edits are counted in skipped and write nothing. Read-your-writes: the response carries every named row's post-write state and version.

A Select or Multi-select cell takes only the column's own options (its type_options.choices): each value is matched to one ignoring case and spacing and stored as the option is spelled, and one that names no option refuses the whole batch with a 422 cell_value_not_a_choice naming the cell and the options. restore is for the grid's undo and redo history ONLY: it writes back a value the options no longer name exactly as the cell held it. Never set it to get a new value past the options; add the value to the column's options instead.