fix(casaos): set app_id with prefix in converter output, remove deprecated package_name

[mairas]

Summary

The CasaOS converter sets package_name in metadata.yaml, but this field is deprecated and ignored by the loader. This field should be removed from the converter output.

Background

The package naming system works as follows:

1. app_id is derived from the directory name (e.g., 2fauth)
2. --prefix is passed at build time (e.g., --prefix casaos)
3. package_name is computed: {prefix}-{app_id}-container → casaos-2fauth-container

The deprecated package_name field in converter output serves no purpose and should be removed.

Solution

Remove package_name from the CasaOS converter output in transformer.py.

The build script in halos-imported-containers will be updated separately to pass --prefix "$source_name" to generate-container-packages.

Files to Modify

• src/generate_container_packages/converters/casaos/transformer.py - Remove package_name from output
• tests/converters/casaos/test_transformer.py - Update tests to not expect package_name

Related

• Part of Container lifecycle conventions: Docker-managed restarts and journald logging halos-distro#49 (Container lifecycle conventions)
• Companion fix in halos-imported-containers: add --prefix to build script