make kestrel a tak server, so that it can send and receive pois as cots data

test/unit/poiConstants.spec.js

@@ -0,0 +1,9 @@
+import { describe, it, expect } from 'vitest'
+import { POI_ICON_TYPES } from '../../server/utils/poiConstants.js'
+
+describe('poiConstants', () => {
+  it('exports POI_ICON_TYPES as frozen array', () => {
+    expect(POI_ICON_TYPES).toEqual(['pin', 'flag', 'waypoint'])
+    expect(Object.isFrozen(POI_ICON_TYPES)).toBe(true)
+  })
+})