fix: add --yes flag to cosign sign to fix Rekor upload failures

Resolves #4254

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

Author: dx4homelab

.github/workflows/reusable-build.yml

@@ -203,7 +203,7 @@ jobs:
       - name: Sign container image
         if: github.event_name != 'pull_request'
         run: |
-          cosign sign -y --key env://COSIGN_PRIVATE_KEY ${{ steps.registry_case.outputs.lowercase }}/${{ env.IMAGE_NAME }}@${TAGS}
+          cosign sign -y --yes --key env://COSIGN_PRIVATE_KEY ${{ steps.registry_case.outputs.lowercase }}/${{ env.IMAGE_NAME }}@${TAGS}
         env:
           TAGS: ${{ steps.push.outputs.outputs && fromJSON(steps.push.outputs.outputs).digest }}
           COSIGN_EXPERIMENTAL: false