RemoteIdBroadcast::update stored NED metres (state.position.x/.y) into
drone_lat/drone_lon, so the ASTM F3411 broadcast would carry physically
-impossible coordinates ("latitude = 37.5 m"). The module doc claimed a
Location/Vector message but only encode_basic_id() exists.
- Rename drone_lat/drone_lon -> drone_north_m/drone_east_m (NED metres
relative to the operator/takeoff datum), documented as non-geodetic.
operator_lat/lon stay true WGS84.
- Correct the module doc to claim Basic ID only; Location/Vector encoding
is deferred until a datum-anchored NED->WGS84 transform lands.
Never broadcast physically-impossible coordinates.
Failing-on-old test:
security::remote_id::tests::test_ned_offset_stored_as_metres_not_latlon.
Co-Authored-By: claude-flow <ruv@ruv.net>