Code Review

This pull request refactors timestamp parsing in Firebase Database functions to use a centralized utility, improving support for various ISO 8601 formats, including those without microsecond precision. It updates db_fn.py to use timestamp_conversion, refactors get_precision_timestamp in util.py for better robustness, and adds comprehensive test cases. Feedback includes correcting the docstring for get_precision_timestamp to reflect its actual return type and improving the error handling in util.py by providing a more descriptive error message and using the walrus operator for conciseness.

Lgtm, solid

I think the logic in this is solid, but as I got help from AI reviewing it suggested we could fix a long-standing but and simply the code at the same time. Let me know what you think?

Thanks for updating, this looks great! I appreciate the little optimizations over the AI suggestions.