Remove Python extension precompilation and give Julia an inferrability assist

[kshyatt-aws]

Issue #, if available: N/A

Description of changes: Each new Python session creates a new C handle to the Python library, which means type conversion methods are invalidated at each new Python session. Forcing a first run at module import means the actual first simulation is fast, at the cost of a slower import. This means the Python extension precompilation is invalidated.

Testing done: Unit tests passed locally

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