Replace remaining expensive CLI lifecycle checks with seeded fixtures or focused unit coverage so the concurrent suite spends less time on duplicate full-process setup.
Wrap root CLI errors at the main boundary so fatal diagnostics use miette's styled renderer while preserving existing telemetry, exit codes, and auth help hints.
- centralize FABRO_HOME and storage path resolution in fabro-config
- rename store types, extract ArtifactStore, and simplify run key layout
- switch run scratch to scratch/, remove RuntimeState, and refresh docs/clients
Rename the hidden detached worker command to __runner, remove launcher
bookkeeping, and resolve runs through a shared server-backed lookup.
This leaves attach, resume, logs, and related commands using the server
as the source of truth and updates the integration coverage around the
new lifecycle.
