bug: Unsatisfied if condition on immutable variable should not generate the dependent UIs and data

[Arpita-Jaiswal]

There is an issue where data is being generated unnecessarily in fastn under specific conditions. This occurs when the data is tied to an if condition that is based on a variable that is not mutable. Since the variable never changes during the lifecycle of the page, the conditional block of code should not trigger data generation. However, the data is still being generated, which is inefficient.