Add consumer-facing CHANGELOG.md maintained by release CI.

Backfill version history from git tags and update CHANGELOG automatically on each release alongside Gitea release notes.

Co-authored-by: Cursor <[email protected]>

.gitea/workflows/release.yml

@@ -40,6 +40,15 @@ jobs:
           NEW_TAG="v${{ steps.bump.outputs.version }}"
           scripts/ci/generate-release-notes.sh "$NEW_TAG" "$PR_TITLE" "$PREV_TAG"
 
+      - name: Update CHANGELOG
+        if: steps.meta.outputs.bump != 'skip'
+        env:
+          PR_TITLE: ${{ steps.meta.outputs.pr_title }}
+        run: |
+          PREV_TAG=$(git describe --tags --abbrev=0)
+          VERSION="${{ steps.bump.outputs.version }}"
+          scripts/ci/update-changelog.sh "$VERSION" "$PR_TITLE" "$PREV_TAG"
+
       - name: Commit, tag, and push
         if: steps.meta.outputs.bump != 'skip'
         env:
@@ -48,7 +57,7 @@ jobs:
         run: |
           git config user.name "CI Bot"
           git config user.email "[email protected]"
-          git add pyproject.toml uv.lock
+          git add pyproject.toml uv.lock CHANGELOG.md
           git commit -m "chore: release v${VERSION} [skip ci]"
           git tag "v${VERSION}"
           git remote set-url origin "https://x-access-token:${CI_RUNNER_TOKEN}@${GITHUB_SERVER_URL#https://}/${GITHUB_REPOSITORY}.git"