Add checkpoint_context.py to map flat orbax v0 flags to Orbax v1 Context.#4381
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…ext. This new module provides functions to build Orbax v1 Context, SaveDecisionPolicy, and PreservationPolicy objects based on MaxText's checkpoint configuration flags. It centralizes the logic for configuring Orbax v1, replacing various scattered v0 Orbax constructs previously used in MaxText. Unit tests are included to verify the correct mapping of flags to Orbax v1 options. PiperOrigin-RevId: 944311354
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Add checkpoint_context.py to map flat orbax v0 flags to Orbax v1 Context.
This new module provides functions to build Orbax v1 Context, SaveDecisionPolicy, and PreservationPolicy objects based on MaxText's checkpoint configuration flags. It centralizes the logic for configuring Orbax v1, replacing various scattered v0 Orbax constructs previously used in MaxText. Unit tests are included to verify the correct mapping of flags to Orbax v1 options.