- Updated StoreBase.__init__ to accept machine: str and flake: Flake
- Modified all StoreBase subclasses (in_repo, vm, fs, sops, password_store) to match new signature
- Added select_machine method to Flake class for machine-specific attribute selection
- Updated Machine.select to use the new Flake.select_machine method
- Fixed all test cases to pass machine name and flake to store constructors
- Maintained backward compatibility by keeping the same external API
This reduces coupling between the store system and the Machine class,
making the architecture more modular and flexible.
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