Replace Google Maps with Esri (ArcGIS) basemaps

Swaps the map provider behind the existing provider-neutral JobMapProps
interface: EsriJobMap.tsx (ArcGIS Maps SDK) replaces GoogleJobMap.tsx,
loaded via esri-loader's CDN script rather than bundled through webpack —
next dev's inline source-mapping of a library this size was OOM-killing
the whole host on first compile. Also fixes a bug in the fit-bounds camera
call: view.goTo() needs real Graphic/Geometry instances, not plain point
literals, so the map was never zooming to the plotted points.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/components/map/JobMap.tsx

@@ -1,10 +1,9 @@
 import dynamic from 'next/dynamic';
 import type { JobMapProps } from './types';
 
-// Provider dispatcher. Google is the only implementation for now; an Esri
-// implementation would be selected here (e.g. via NEXT_PUBLIC_MAP_PROVIDER).
-const GoogleJobMap = dynamic(() => import('./google/GoogleJobMap'), { ssr: false });
+// Provider dispatcher. Esri (ArcGIS) is the only implementation.
+const EsriJobMap = dynamic(() => import('./esri/EsriJobMap'), { ssr: false });
 
 export default function JobMap(props: JobMapProps) {
-  return <GoogleJobMap {...props} />;
+  return <EsriJobMap {...props} />;
 }