- CODEBURN_PROGRESS=1 emits newline-JSON progress on stderr (provider
list, per-provider start/done, per-file ticks) for GUI first-run
loaders; plain CLI output untouched
- parseAllSessions saves the session cache atomically every 5s during
hydration and after each provider group, so an interrupted cold scan
leaves a warm partial cache instead of nothing
- status --no-timeline skips the granular timeline computation
(~300-450ms per call) for clients that never render it; default
unchanged for the menubar
