fix: resolve bundled data URLs when used, not at import

The submarine cable source and the infrastructure data URLs built their
asset URLs from import.meta.url while the module loaded. Importing the
tool services therefore failed in runtimes without a usable module URL,
even for tools that never read those files. Build the URLs when they are
read; Vite still rewrites them in browser builds.

src/sources/infrastructureData.js

@@ -3,16 +3,19 @@
  * data files, line-delimited GeoJSON parsing and analyst records.
  */
 
-// Resolved by Vite in builds and relative to this module in other consumers.
+// Resolved by Vite in builds and relative to this module in other consumers,
+// when read, so importing this module never needs a module URL.
 export const INFRASTRUCTURE_DATA_URLS = Object.freeze({
-  'local-datacenters': new URL(
-    '../data/local_data/datacenters/datacenters.geojsonl',
-    import.meta.url,
-  ).href,
-  'local-dams': new URL(
-    '../data/local_data/dams/dams.geojsonl',
-    import.meta.url,
-  ).href,
+  get 'local-datacenters'() {
+    return new URL(
+      '../data/local_data/datacenters/datacenters.geojsonl',
+      import.meta.url,
+    ).href;
+  },
+  get 'local-dams'() {
+    return new URL('../data/local_data/dams/dams.geojsonl', import.meta.url)
+      .href;
+  },
 });
 
 /** Parse GeoJSON Lines: one Feature per non-empty line. */