Added accurateCastOrDefault function and resolved issue #21330

Why it matters

This feature addresses the need for safer and more accurate type conversions by allowing users to cast a value x to a target type T and return a default value if the cast fails, preventing query errors and improving robustness.

How to use it

Use the function in your queries as accurateCastOrDefault(x, T), where x is the value to cast and T is the target data type. This will attempt to cast x to type T and return a default value on failure.