getCoreRowModel
Builds the core row-model factory. The returned function is invoked once per Table and produces a memoised getter for the core RowModel.
The memoised function is exposed as a zero-arg () -> RowModel<TData> because the underlying memo always accepts a one-arg (TArg) -> R; this wraps a null depArgs through to match the original () => ... shape used everywhere row-model factories are read.