Fix sidecar release conflict: stop modifying version.py

Both release.yml and sidecar-release.yml were updating version.py,
causing merge conflicts when both ran on the same push. Now:
- release.yml (app) owns: package.json, tauri.conf.json, Cargo.toml, version.py
- sidecar-release.yml owns: pyproject.toml only

Also deleted the stale sidecar-v1.0.4 tag that failed to push.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/sidecar-release.yml

@@ -61,9 +61,8 @@ jobs:
           NEW_VERSION="${MAJOR}.${MINOR}.${NEW_PATCH}"
           echo "New sidecar version: ${NEW_VERSION}"
 
+          # Only update pyproject.toml -- version.py is owned by the app release workflow
           sed -i "s/^version = \"${CURRENT}\"/version = \"${NEW_VERSION}\"/" pyproject.toml
-          sed -i "s/__version__ = \"${CURRENT}\"/__version__ = \"${NEW_VERSION}\"/" version.py
-          sed -i "s/__version_info__ = .*/__version_info__ = (${MAJOR}, ${MINOR}, ${NEW_PATCH})/" version.py
 
           echo "version=${NEW_VERSION}" >> $GITHUB_OUTPUT
           echo "tag=sidecar-v${NEW_VERSION}" >> $GITHUB_OUTPUT
@@ -75,7 +74,7 @@ jobs:
         run: |
           NEW_VERSION="${{ steps.bump.outputs.version }}"
           TAG="${{ steps.bump.outputs.tag }}"
-          git add pyproject.toml version.py
+          git add pyproject.toml
           git commit -m "chore: bump sidecar version to ${NEW_VERSION} [skip ci]"
           git tag "${TAG}"