test(qa): floor verification reads the app's ground floor and measures models where drawn

- The DEM prior column read a fresh import of src/data/groundFloor.js, a
  module the app does not use for its layers (they read the scene's
  surface services), so it was null for every contact. It now reads
  window.__godsEyeView.surfaceServices.groundFloor. The terrain proxy
  answers 200 and the AUS cells resolve within one or two polls (123-128 m);
  the "proxy 503" reading in the task-11 report was this misread.
- A contact a 3D model draws is measured at the model's translation (the
  probe's drawn() reports it now): its sprite is hidden and keeps the
  pre-floor height by design (T7), so measuring the sprite reported a
  buried aircraft that is not drawn.

src/layers/aircraft/qaDrawn.js

@@ -9,6 +9,11 @@
  *   handle), `_models` (id → model handle), `_trackedIcao`, `_trackedModel`.
  * @returns {Array<object>}
  */
+const translationOf = (matrix) =>
+  matrix && Number.isFinite(matrix[12])
+    ? { x: matrix[12], y: matrix[13], z: matrix[14] }
+    : null;
+
 export function aircraftQaDrawn(state) {
   const out = [];
   for (const [id, sprite] of state._billboards) {
@@ -36,6 +41,8 @@ export function aircraftQaDrawn(state) {
             computedScale: model.computedScale,
             show: model.show,
             ready: model.ready,
+            // Where it is drawn: its transform's translation.
+            position: translationOf(model.modelMatrix),
           }
         : null,
     });