'baryon' release orchestration (+ patch)

• run basic functional tests in staging (PM task)
• all related functional doc. reviewed and published
• functional changelog
• milestone changelog + sem.ver. review + new/updated/deleted config. + compatibilities
• mailchimp com' (PM task)
• update docker-compose demo (@RedPDRoncoli )
• release baryon patch 31 October
  • changelog
  • mailchimp