Code for DPLM2/2.1 representation learning

Thanks for providing the code for DPLM representation learning.
I am interested in the problem discussed in section 4.5 of DPLM2 paper and want to do further experiments on it. Could you please also release the representation learning code for DPLM2/2.1? Thank you!

Start by reading section 4.5 of the DPLM2 paper and comparing it with the repository's existing DPLM representation-learning code. No files or tests are named, so first locate the relevant implementation and determine what DPLM2/2.1 representation-learning components are needed. Done means releasing the requested code for further experiments.

Written by the indexing model from the issue text.