PSS: Update how commands access backends, so both `backend` and `state_store` configuration can be used#37569

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SarahFrench wants to merge 9 commits intomainfrom

pss/update-how-commands-access-backend

Commits on Sep 8, 2025

Pull code for obtaining provider factory into a separate method
SarahFrench
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Add a generic method for loading an operations backend in non-init commands
SarahFrench
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Refactor commands to use new prepareBackend method: group 1
SarahFrench
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Refactor commands to use new prepareBackend method: group 2, where config parsing needs to be explicitly added
SarahFrench
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Refactor commands to use new prepareBackend method: group 3, where we can use already parsed config
SarahFrench
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Additional, more nested, places where logic for accessing backends needs to be refactored
SarahFrench
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Remove duplicated comment
SarahFrench
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Add test coverage for getStateStoreProviderFactory, add more nil checks
SarahFrench
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Commits on Sep 9, 2025

Add test coverage of `(m *Meta) prepareBackend()`
SarahFrench
committed