GitLab

* ema test cases.

* debugging maessages.

* debugging maessages.

* add: tests for ema.

* fix: optimization_step arg,

* handle device placement.

* Apply suggestions from code review
Co-authored-by: Will Berman <wlbberman@gmail.com>

* remove del and gc.

* address PR feedback.

* add: tests for serialization.

* fix: typos.

* skip_mps to serialization.

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Co-authored-by: Will Berman <wlbberman@gmail.com>
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>