GMrepo Get Phenotypes

List phenotypes and health conditions with gut microbiome data in the GMrepo database. Returns MeSH disease IDs, sample counts, and species/genus diversity for each phenotype. Optionally filter with the `query` parameter (e.g., 'diabetes', 'obesity', 'cancer'). GMrepo covers 350+ phenotypes including healthy controls. Use this to find what conditions have microbiome data available.