Improve the federation status command to show more comprehensive
information similar to `git remote -v` with health info:
- Show peer URLs alongside peer names
- Display pending local changes count (uncommitted)
- Test connectivity to each peer (via fetch)
- Track and display last sync time in metadata table
- Show reachability status with error messages on failure
Changes:
- cmd/bd/federation.go: Enhanced status output with URLs, connectivity
checks, pending changes, and last sync time
- internal/storage/dolt/federation.go: Added getLastSyncTime/setLastSyncTime
methods using metadata table, record sync time on successful sync
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
c3f68caf7a