[akutuva21]

Replaced assert statements and print statements in csimulator.py with the standard BNGLogger logging framework and explicit exception raising (BNGSimulatorError). This improves error visibility, structure, and avoids uninformative AssertionError crashes during simulations.

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PR created automatically by Jules for task 15760036088045385340 started by @akutuva21

[google-labs-jules]

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[akutuva21]

Superseded by #94 csimulator assert->BNGError transition.

[google-labs-jules]

Superseded by #94 csimulator assert->BNGError transition.

Understood. Acknowledging that this work is now superseded by #94 and stopping work on this task.