fix: align task_ids with Hugging Face official taxonomy (tabular-multi-class-classification)

docs: add verified @Radia1 and @ImaneSDG tags to dataset team roster

docs: add verified Hugging Face profile tag for @oualidghaffari

docs: add exact 4-person team (El Hadji, Bahaya, Ghaffari, Sadog)

docs: upgrade dataset card with full Hugging Face viewer configs & schema

feat: upload healthcare stroke prediction dataset