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.

scripts/package-boundaries.json

@@ -3500,6 +3500,7 @@
       "src/voice/geminiCaptureWorklet.js",
       "src/ui/libraryBrowser.js",
       "src/library/manifest.js",
+      "src/data/libraryLayerIds.js",
       "src/library/selection.js",
       "src/library/ledger.json",
       "src/library/entries/ak-statewide-imagery.json",
@@ -4571,7 +4572,7 @@
     "modules": [
       "src/data/lifecycle.js",
       "src/data/cameraArrival.js",
-      "src/library/manifest.js"
+      "src/data/libraryLayerIds.js"
     ],
     "external": []
   },