ci: ensure labels exist before creating issue on CI failure

The "Create issue on CI failure" step was failing because the
"automated" label didn't exist in the repo. Add idempotent
gh label create calls before gh issue create.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: pRizz

.github/workflows/update-opencode-commit.yml

@@ -235,6 +235,11 @@ jobs:
           SUBMODULE_BRANCH: ${{ steps.update.outputs.submodule_branch }}
         run: |
           set -euo pipefail
+
+          # Ensure required labels exist (--force is a no-op if label already exists)
+          gh label create "bug" --description "Something isn't working" --color "d73a4a" --force || true
+          gh label create "automated" --description "Created by automation" --color "0e8a16" --force || true
+
           run_url="${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}"
           commit_short="${LATEST_COMMIT:0:12}"
           commit_url="${SUBMODULE_REPO_URL:-}/commit/${LATEST_COMMIT:-unknown}"