* docs(hub): align public docs with v0.3
Bring the public workflow, API, authority, activity, and self-hosting guidance in line with the released Hub contracts. Clarify the public HTTPS boundary required by provider events while keeping Hub and PostgreSQL private.
* docs(hub): clarify daemon logout scope
* docs(hub): restore Compose path and simplify TLS guidance
* docs(hub): link the single-repo-team-bot example