feat: generate zadara charm

[ahmad-can]

Related Charm https://review.opendev.org/c/openstack/sunbeam-charms/+/984541

[Copilot]

Pull request overview

Adds initial support for a Zadara storage backend in Sunbeam by introducing a new backend implementation plus unit tests and fixture wiring so the backend participates in the shared backend test suite.

Changes:

• Introduce ZadaraBackend and ZadaraConfig under sunbeam.storage.backends.zadara.
• Add a new unit test module for the Zadara backend/config validation.
• Extend backend test fixtures and common “all backends” assertions to include Zadara.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
sunbeam-python/sunbeam/storage/backends/zadara/backend.py	New backend + pydantic config model for ZadaraVPSA iSCSI.
sunbeam-python/sunbeam/storage/backends/zadara/__init__.py	Declares the new backend package.
sunbeam-python/tests/unit/sunbeam/storage/backends/test_zadara.py	Adds Zadara-specific tests (type/charm name, secret marking, protocol validation).
sunbeam-python/tests/unit/sunbeam/storage/backends/test_common.py	Includes Zadara in shared uniqueness/expectations tests.
sunbeam-python/tests/unit/sunbeam/storage/backends/conftest.py	Adds zadara_backend fixture and includes it in any_backend parametrization.

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