Move the prompt for required variables AFTER the if condition check.
This avoids asking the user for input when the task won't run anyway.

The order in RunTask() is now:
1. FastCompiledTask
2. Check required vars early (non-interactive mode only)
3. CompiledTask (resolve dynamic vars)
4. Check if condition → exit early if false
5. Prompt for missing vars (only if task will run)
6. Validate required vars