Function moon_elevation_deg 

pub fn moon_elevation_deg(station: &GeodeticStationKm, time: UtcInstant) -> f64

Topocentric geometric Moon (disk-center) elevation at a station and UTC instant, degrees.

Sibling of sun_elevation_deg. Unlike that low-precision geocentric-up helper, this routes through the full station-to-target ENU reduction (crate::astro::bodies::observe::moon_az_el), so it includes the topocentric (diurnal) parallax that matters for the nearby Moon.