Keep the library layer namespace in the layer lifecycle package

The core layer lifecycle imported the whole Data Library manifest
contract only to check the lib- prefix, so the layer-lifecycle package
owned a feature module. The namespace rule (prefix, entry id pattern,
the two id helpers) now lives in src/data/libraryLayerIds.js, which the
lifecycle owns; the manifest contract imports and re-exports it, so
library callers are unchanged.

src/data/lifecycle.js

@@ -1,5 +1,5 @@
 import { cancelCameraArrival } from './cameraArrival.js';
-import { libraryEntryIdOf } from '../library/manifest.js';
+import { libraryEntryIdOf } from './libraryLayerIds.js';
 
 function cloneLayerParams(value) {
   if (Array.isArray(value)) return value.map(cloneLayerParams);