OXYGENHUB

Changes up to # ac689cd21adf touching crates/hub/src/mail.rs · 5

See as swimlanes (independent work side by side)

Mail reads [OxygenHub], in a wider message (closes #334)
Andy McCall via agent:claude@andymccall agent ·
Metrics: OxygenFlow runs and runners' heartbeats, and mail
Andy McCall via agent:claude@andymccall agent ·