refactor: drop semantic-release from npm workflow, publish on GitHub release

npm version tagging is now owned by pypi-release.yml (python-semantic-release).
npm-release.yml triggers on release published events and does a plain npm publish,
eliminating the conflict between two workflows creating release tags.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: farhan

.github/workflows/npm-release.yml

@@ -1,41 +1,32 @@
-name: Release CI
+name: npm Release
+
 on:
-  push:
-    branches:
-      - master
+  release:
+    types: [published]
 
 jobs:
-  run_tests:
-    uses: ./.github/workflows/ci.yml
-    secrets: inherit
+  publish:
+    runs-on: ubuntu-latest
     permissions:
       contents: read
 
-  release:
-    name: Release
-    needs: run_tests
-    runs-on: ubuntu-latest
-    permissions:
-      id-token: write  # Required for OIDC
-      contents: write  # For Semantic Release tagging
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
-        with:
-          fetch-depth: 0
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Setup Node.js
         uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: '.nvmrc'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Set version from release tag
+        run: npm version ${{ github.event.release.tag_name }} --no-git-tag-version
 
       - name: Install dependencies
         run: npm ci
 
-      - name: Create Build
-        run: npm run build
-
-      - name: Release Package
-        run: npx semantic-release@25
+      - name: Publish to npm
+        run: npm publish
         env:
-          GITHUB_TOKEN: ${{ secrets.OPENEDX_SEMANTIC_RELEASE_GITHUB_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}