[akutuva21]

🧹 Bolt: Replace assert statements with structured BNGErrors

What:
Replaced generic assert statements in bionetgen/simulator/csimulator.py with structured BNGSimulatorError (a subclass of BNGError) and standardized error logging via BNGLogger. Also added BNGSimulatorError to bionetgen.core.exc.

Why:
To transition from generic assertions to specific custom exception classes for better error handling, traceability, and logging as part of an ongoing project convention update. This prevents application crashes with uninformative AssertionErrors.

Verification:
I manually verified the error raising mechanism through mock objects, ensuring that when unequal array lengths are supplied, the code successfully raises a BNGSimulatorError and logs the message appropriately. Tests were run, and any pre-existing environment-related failures were unchanged.

Result:
Safer error checking and logging implemented for simulation parameter setups.

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PR created automatically by Jules for task 6233764973034024898 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Superseded by #94 csimulator assert-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Superseded by #94 csimulator assert-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 obsolete and stopping work on this task.