refactor(app): share application components and request services

src/data/alprCameras.js

@@ -1,3 +1,4 @@
+import { createSourceSlot } from '../app/sourceSlot.js';
 import {
   createAlprCamerasLayer,
   createOverpassAlprSource,
@@ -7,7 +8,13 @@ import * as context from './contextStore.js';
 import * as picking from './pickRegistry.js';
 import * as groundFloor from './groundFloor.js';
 export * from '../layers/alpr/index.js';
+const slot = createSourceSlot(
+  createOverpassAlprSource(),
+  ['fetch'],
+  'ALPR source',
+);
+export const configureAlprSource = slot.configure;
 export default createAlprCamerasLayer({
-  source: createOverpassAlprSource(),
+  source: slot.source,
   services: { render, context, picking, groundFloor },
 });