ci(readme): auto-generate release notes on tag, add dashboard tour to README

- bump-version.yml now creates a GitHub Release with `--generate-notes`
  alongside each version tag, so the Tags/Releases page is self-describing
  instead of a bare list of vX.Y.Z tags with no context.
- README gets a Dashboard Tour gallery using the wiki's existing
  user-attachments image URLs (no binary images added to the repo).

.github/workflows/bump-version.yml

@@ -5,6 +5,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: bump-version-main
+  cancel-in-progress: false
+
 jobs:
   bump-version:
     runs-on: ubuntu-latest
@@ -49,8 +53,17 @@ jobs:
           git config user.email "github-actions[bot]@users.noreply.github.com"
           git add pyproject.toml
           git commit -m "chore: bump version to ${{ steps.bump.outputs.new_version }} [skip ci]"
+          git pull --rebase origin main
           git push
       - name: Tag the release
         run: |
           git tag "v${{ steps.bump.outputs.new_version }}"
           git push origin "v${{ steps.bump.outputs.new_version }}"
+
+      - name: Create GitHub release with auto-generated notes
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release create "v${{ steps.bump.outputs.new_version }}" \
+            --title "v${{ steps.bump.outputs.new_version }}" \
+            --generate-notes