lightgbm.unify() fails when model or data are too big

[p-schaefer]

Due to R not being able to handle large character strings, with a resulting error: Error: R character strings are limited to 2^31-1 bytes. See microsoft/LightGBM#6288 (comment)

[jameslamb]

See microsoft/LightGBM#6288 (comment)

This conversation has moved to microsoft/LightGBM#6380.