fix(ci): clean stale dist artifacts before semantic-release publish

The release job restored a cached ./dist from the build job (built with
the pre-bump version) and then semantic-release-pypi rebuilt the package
with the new version into the same directory. Twine then attempted to
upload both versions; PyPI rejected the older (deleted) filename and the
whole upload aborted, leaving the new version unpublished.

Wipe ./dist after restoring the cache and before semantic-release runs,
so semantic-release-pypi builds and uploads only the current version.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: VinciGit00

.github/workflows/release.yml

@@ -81,6 +81,9 @@ jobs:
           path: ./dist
           key: ${{ runner.os }}-build-${{ github.sha }}
 
+      - name: Clean stale dist artifacts
+        run: rm -rf ./dist/* || true
+
       - name: Semantic Release
         uses: cycjimmy/semantic-release-action@v4.1.0
         with: