fix(ci): skip prepack on npm publish — dist+cdn already staged by build job

The deploy job downloads artifacts from build-emception which already
contain packages/core/dist and packages/core/cdn (staged via the explicit
'Stage CDN into emception package' step). Running prepack again calls
stage-core-cdn.mjs which now throws if build/cdn is absent (P0' change),
because build/cdn is never created in the deploy job.

--ignore-scripts is safe: all outputs are already built and staged.

Author: tolstenko

.github/workflows/main.yml

@@ -437,7 +437,7 @@ jobs:
             fi
 
             echo "📦 Publishing ${NAME}@${VERSION}"
-            npm publish --workspace="${NAME}" --access public
+            npm publish --workspace="${NAME}" --access public --ignore-scripts
           done
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}