fix(release): pass GH_TOKEN to release process for gh CLI auth

The release script uses 'gh release create' to create GitHub releases,
but the workflow wasn't providing authentication. This caused the
release to fail with 'gh auth login' error.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: gaborbernat

.github/workflows/prepare-release.yaml

@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@v6
         with:
           fetch-depth: 0
-          token: ${{ secrets.RELEASE_PAT || secrets.GITHUB_TOKEN }}
+          token: ${{ secrets.RELEASE_PAT }}
 
       - name: Install the latest version of uv
         uses: astral-sh/setup-uv@v7
@@ -40,13 +40,8 @@ jobs:
 
       - name: Configure git
         run: |
-          if [ -n "${{ secrets.RELEASE_PAT }}" ]; then
-            git config user.name "${{ github.actor }}"
-            git config user.email "${{ github.actor }}@users.noreply.github.com"
-          else
-            git config user.name "github-actions[bot]"
-            git config user.email "github-actions[bot]@users.noreply.github.com"
-          fi
+          git config user.name "${{ github.actor }}"
+          git config user.email "${{ github.actor }}@users.noreply.github.com"
 
       - name: Set up remote tracking
         run: |
@@ -94,6 +89,8 @@ jobs:
 
       - name: Run release process
         run: tox run -e release -- ${{ steps.version.outputs.version }}
+        env:
+          GH_TOKEN: ${{ secrets.RELEASE_PAT }}
 
       - name: Display completion message
         run: echo "Release ${{ steps.version.outputs.version }} prepared and pushed successfully!"