v0.1.5 - enriched JSON, refresh indicator, slower sampling, bits label
Added:
- Enriched --once --json output with status, timestamp (RFC3339), download_human, and upload_human fields for self-contained script consumption
- Refresh interval permanently displayed in footer when non-default (e.g. every 5s)
- Extended sampling range up to 5 minutes (30s, 60s, 300s) for overnight monitoring
- Bits indicator shows [bits] label in footer when bits mode is active for clear differentiation from bytes mode