Move VG-Observe module identity into dedicated module file

src/background.js

@@ -1,12 +1,6 @@
 console.log("VG-Observe background loaded");
 
-globalThis.VGCoreModuleRegistry.registerModule({
-  id: "vg-observe",
-  name: "VG-Observe",
-  description: "TCF, CMP, GVL and consent evidence observation module",
-  kind: "evidence",
-  status: "active",
-});
+// VG-Observe module registration lives in src/modules/vg-observe/module.js.
 
 const OFFICIAL_IAB_GVL_URL =
   "https://vendor-list.consensu.org/v3/vendor-list.json";