fix : correct additional_data truthiness check in error_logger.log_exception

[tmdeveloper007]

Summary of What Has Been Done

In error_logger.py, the log_exception function used if additional_data: to guard the line that adds additional_data to the log payload. This is incorrect because an empty dict {} evaluates to False in Python's truthiness check, so explicitly passing additional_data={} would silently not include it in the logged payload.

Changes Made

Changed if additional_data: to if additional_data is not None: so that an empty dict is correctly included while None is skipped.

Impact it Made

• Empty dicts passed as additional_data are now correctly included in the log payload.
• Prevents silent data loss when callers explicitly pass additional_data={}.

Closes #1859.

Note: Please assign this PR to the tmdeveloper007 account.

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