Health

Liveness and DB readiness for the running web container. Two surfaces share the same checks:

• /healthz — JSON, used by Render's health probe (HTTP 200 = live; the probe doesn't read the body, so a DB outage shows up in metrics + logs rather than failing the deploy).
• /health (this page) — templated for humans, reachable from the navbar.

app is the build identifier; env is the active configuration profile (production / test); db is a live SELECT 1 against the configured database; commit is the short SHA of the Render-deployed build (Render sets RENDER_GIT_COMMIT automatically).