enhance sql-using-python-udf example

[Ritinikhil]

[ ] Add comprehensive comments and documentation
[ ] Implement multiple data registration methods for API compatibility Add version information printing for debugging
[ ] Improve error handling with informative messages
[ ] Add formatted table output for better readability
[ ] Include input validation through PyArrow schema
[ ] Add results verification with assertions

Author: Ritinikhil

[timsaucer]

I'm not quite sure what was lacking in the examples before. For the sql example, I think all of the try/except blocks lead to more complexity than we want for a user example. What problem are you trying to solve with it?

For the substrait example, it looks like you've also removed the last portions.

It would be helpful to know what you think were the deficiencies in these examples before so I can understand why we need to update them.