Read the atmosphere snapshot

The Atmosphere tab is the dashboard of habitability: what the crew is actually breathing.

Per vehicle you see:
- **pO2** (partial pressure of oxygen) — nominal range varies by mission profile (typically 2.5–3.5 psi for high-altitude EVA prep, ~3.0 for ISS)
- **pCO2** — should stay below 0.7 kPa; long-duration accumulation drives cognitive degradation
- **pN2** — total pressure minus O2 and CO2 contributions
- **Humidity** — typically 25–75% RH
- **Temperature** — cabin air temp
- **Total pressure** — sum of partials; 14.7 psi is sea level

Source of the snapshot:
- **Push ingest** — onboard telemetry sends snapshots via the bridgeApiKeys-protected HTTP endpoint
- **Manual** — log a reading from the form (test environments, sims)
- Both write to the same store; the most recent is what the dashboard shows.

Wally tool `lifeSupport_atmosphereStatus` returns the current snapshot for the selected vehicle.