refactor: move infrastructure data parsing into a portable source module

The datacenter and dam layers parsed their bundled GeoJSON Lines and
built analyst records inside the Cesium-backed layer module. Move the
data URLs, the line parser, mapAnalystRecord and layerTitle unchanged to
src/sources/infrastructureData.js; the layer module imports them and
still exports mapAnalystRecord. The consumer-build pin lists the new
module.

scripts/package-boundaries.json

@@ -10,7 +10,8 @@
       "src/data/localGeojsonCore.js",
       "src/data/localGeojsonLod.js",
       "src/data/inputOwnership.js",
-      "src/data/infrastructureOverlayEntry.js"
+      "src/data/infrastructureOverlayEntry.js",
+      "src/sources/infrastructureData.js"
     ],
     "external": ["cesium"]
   },
@@ -2034,7 +2035,8 @@
       "src/sources/requestDeadline.js",
       "src/data/local_data/osm_military_names/names.json",
       "src/layers/installations/namedMarkers.js",
-      "src/data/infrastructureOverlayEntry.js"
+      "src/data/infrastructureOverlayEntry.js",
+      "src/sources/infrastructureData.js"
     ],
     "external": [
       "hls.js",
@@ -2520,7 +2522,8 @@
       "src/sources/requestDeadline.js",
       "src/data/local_data/osm_military_names/names.json",
       "src/layers/installations/namedMarkers.js",
-      "src/data/infrastructureOverlayEntry.js"
+      "src/data/infrastructureOverlayEntry.js",
+      "src/sources/infrastructureData.js"
     ],
     "external": [
       "hls.js",