We need to update this to support MEDS v0.3

[mmcdermott]

Tagging @Oufattole @teyaberg @aleksiakolo @mandiehyewon -- this is high priority.

So, there are a few pieces to this:

• Updating column names and such to be consistent with MEDS v0.3 for the data schema (timestamp -> time, numerical_value -> numeric_value) #56
• Updating path inputs and outputs to be consistent with MEDS v0.3 (final_cohort -> data, store all MEDS-Tab outputs in an output cohort directory instead of the input MEDS cohort directory so we don't overwrite MEDS cohort metadata). #57
• Updating how we handle patient splits to use metadata/patient_splits.parquet #58
• Add a versioned dependency to meds in our pyproject.toml that is frozen at 0.3 so that we can clearly indicate compatability with which versions of meds. #59
• The way task dataframes are read in needs to be compliant with MEDS v0.3 datasets. #66
• Validation on a tiny MIMIC dataset.
• Full validation on real-world MIMIC dataset.
• Update documentation
• Push new release to pip
• Uncomment versioned dependency on MEDS-transform.

[mmcdermott]

For updating documentation, usage on a real-world dataset looks something like this now: https://gist.github.com/mmcdermott/34194e484d7b2a2f68967b9bbccfb35b