Add ADS-B, AIS, and ALPR map layers with live CoT streaming.

Ingest aircraft and vessel tracks via OSINT feeds and tactical CoT, expose viewport-filtered SSE to the map, and add an OSM ALPR layer with tiled caching and performant marker sync.

server/plugins/trackingFeed.js

@@ -0,0 +1,7 @@
+import { registerCleanup } from '../utils/shutdown.js'
+import { startTrackingFeed, stopTrackingFeed } from '../utils/trackingFeed.js'
+
+export default defineNitroPlugin(() => {
+  startTrackingFeed()
+  registerCleanup(stopTrackingFeed)
+})