[Build Log · Kathmandu, Nepal] IESH v0 — Build Log and First Lessons

The first-generation station: a Raspberry Pi 3B with a DHT22, a BMP280, and an MQ-135 air-quality proxy. It logs locally every 60 seconds and serves its own dashboard. The DHT22 reads about 2°C high at high humidity — we log raw values and document the offset.