Position Sam as health companion

Publish Sam Space metadata

Add medication safety caveats

Document Sam medication reminder safety

Rebrand companion as Sam

Use local audio backend for simulator app

Convert Space to Gradio backend

Document real 0G run commands

docs: explain getting 0G keys onto the robot for HF-installed app

docs: document on-robot demo-station setup and tuning

docs: add README with setup, run and publish guide