Implements the Overseer Experience epic (gt-k0kn):
- gt focus: Shows stalest high-priority goals, sorted by priority × staleness
- gt attention: Shows blocked items, PRs awaiting review, stuck workers
- gt status: Now includes GOALS and ATTENTION summary sections
- gt convoy list: Added --orphans, --epic, --by-epic flags
These commands reduce Mayor bottleneck by giving the overseer direct
visibility into system state without needing to ask Mayor.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
