node-26#9. Adds POST /telemetry/adsb (node-key authed via
require_node_service_or_firebase_token) that upserts one Firestore doc per
icao into a new `aircraft` collection, org_id stamped from the reporting
node the same way upload.py defensively stamps `calls`. firestore.rules
gets a matching docInMyOrg()-gated read rule.
Frontend: useAircraft() mirrors useNodes()'s onSnapshot pattern, filtering
docs older than 2 minutes client-side since nothing prunes a stale aircraft
doc server-side yet. MapView gets an opt-in "Aircraft" overlay (unchecked
by default, like the weather radar layer) rendering a rotated plane glyph
per sighting.
Unverified via typecheck — no Node.js/npm on this authoring box yet (see
CLAUDE.md Testing reality). Server side is pytest-covered (test_telemetry.py).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
