refactor(earthquakes): extract native renderer with identical ground-disc output

Keep refresh, cancellation and label policy engine-neutral; inject the original native entities at composition. Prove static geometry, analyst records, owner disposal and last-good refresh behavior. Native dev and QA-preview pass 18 checks each; all eight baseline PNGs remain byte-identical.

src/app/layers/renderers.js

@@ -1,3 +1,4 @@
+import { createEarthquakesCesiumRenderer } from '../../layers/earthquakes/render/cesium.js';
 import { createLaunchesCesiumRenderer } from '../../layers/launches/render/cesium.js';
 // Which engine draws which layer: the layer renderer registry (plan, "layer
 // renderer interface") and the layer availability API built on it.
@@ -89,6 +90,7 @@ export const layerAvailableOn = (layerId, engineKind) =>
 
 /** Cesium renderers extracted from their layers (render/cesium.js). */
 export const CESIUM_LAYER_RENDERERS = Object.freeze({
+  earthquakes: createEarthquakesCesiumRenderer,
   'rocket-launches': createLaunchesCesiumRenderer,
   satellites: createSatellitesCesiumRenderer,
   flights: createFlightsCesiumRenderer,