Feature request: enrich --once --json snapshot output with timestamp/status/human fields

[Cashie1597]

Hi — flow --once --json is already useful for scripts and dashboards.

Current output tested on macOS:

{
"download_bps": 0,
"interface": "en0",
"peak_down_bps": 0,
"peak_up_bps": 0,
"unit_display": "B/s",
"upload_bps": 0
}

Feature request: enrich the existing JSON snapshot output with a few self-contained fields:

{
"status": "ok",
"timestamp": "2026-07-08T08:13:00+10:00",
"interface": "en0",
"download_bps": 710,
"upload_bps": 0,
"download_human": "710 B/s",
"upload_human": "0 B/s",
"peak_down_bps": 0,
"peak_up_bps": 0,
"unit_display": "B/s"
}

Why this helps:

• timestamp makes each snapshot self-contained.
• status avoids consumers needing to infer success from missing/error fields.
• download_human and upload_human let simple dashboards display values directly.
• Existing numeric fields remain machine-friendly.
• No daemon/history/database behavior needed.

Non-goals:

• no change to TUI behavior
• no database/history tracking
• no new dependency required
• no need to add today totals unless they become available cleanly later

This would make the existing one-shot JSON mode more useful while keeping the current architecture intact.

[programmersd21]

Thank you for testing! And yes, I will work on this.