OXYGENHUB

Changes up to # 1062a0f8e985 touching crates/hub/migrations-pg/0094_job_handback.sql · 1

See as swimlanes (independent work side by side)

Runners hand jobs back, and the queue takes them first (closes #312, refs andymccall/oxygenflow#76)
Andy McCall via agent:claude@andymccall agent ·
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