## Summary
- Adds support for both Docker and Podman container engines in
`build-runtime-srtool.sh` via `IS_PODMAN` environment variable
- Uses `--userns=keep-id` for Podman (proper user namespace handling)
and `--user $(id -u):$(id -g)` for Docker
- Sets `IS_PODMAN=true` in `task-publish-runtime.yml` workflow to enable
Podman by default
## Changes
**`operator/scripts/build-runtime-srtool.sh`:**
- Added conditional logic to detect `IS_PODMAN` env var
- Dynamically selects between `podman` and `docker` as container engine
- Sets appropriate user/namespace flags based on container engine
**`.github/workflows/task-publish-runtime.yml`:**
- Added `IS_PODMAN: true` environment variable to the srtool build step
- Updated comment to use generic "container user" instead of "docker
user"
Co-authored-by: Claude <noreply@anthropic.com>
