What

• Implemented Cloglog Ordinal BART in Stochtree
• Key additions and updates:
  • Added SuffStat and LeafModel classes for Cloglog Ordinal BART
  • Added ordinal_sampler and integrated into the sampling framework
  • Updated partition_tracker (to support auxiliary data), tree_sampler.h, and sampler.cpp
  • Added cloglog_ordinal_bart() R interface function
  • Created a vignette demonstrating use

Why

• Extends Stochtree with support for ordinal outcomes under the cloglog link
• Enables applications to ordinal datasets (e.g., survey responses, Likert-type scales)
• Complements existing BART functionality by broadening the family of supported outcome types

Testing

• Verified implementation through simulation runs
• Tested end-to-end via cloglog_ordinal_bart()
• Vignette included to illustrate use and confirm correctness

Notes

• Backward compatibility: existing models and samplers remain unaffected
• Ready for review and feedback

Thanks so much for reviewing this! Really appreciate your help and feedback as always :-)