v0.8.2

• otta-worktree.sh --prune [hours]. GC for orphaned worktrees left by a run that died before DevOps tore its worktree down. Removes worktrees in ~/.otta/worktrees older than the threshold (default 24h). Age is the safe signal — pipelines take minutes, and it survives squash-merge branch deletion; an in-flight run is never touched. Run manually or on a schedule.