Reproduce OLMO-3-Think-SFT

[abhash-er]

This issue thread is to report the reproducibility steps and results of OLMO-3-Think-SFT using OLMo-Core and open-instruct. We are trying to target the 7B parameter model.

• Specifically we start from the hugging face model, convert it into the OLMo-core format using this script.
• We also need to prepare data before we run the training script. Since OLMO uses packed training instances, we would need to convert the data from HF.
• Then we can use the script at OLMo-core repository to run the SFT.

One can already find the scripts for running it on SLURM over here.