8f0fee838e
Changed SHA tag prefix from `{{branch}}-` to `sha-` to fix build
failures when creating releases from tags. The `{{branch}}` variable
is empty when building from tags (e.g., v1.0.0), which resulted in
invalid Docker tags like `:-7bdde95` instead of `sha-7bdde95`.
This fixes the v1.0.0 release build failure.
Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)
Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>