Function prepare_result 

pub unsafe fn prepare_result(
    data: Value,
    result_buf: *mut *mut u8,
    result_len: *mut usize,
)

Prepare a result for return to the framework

Internal helper function that handles the common memory management for both success and error results.

Safety

The caller must ensure that:

• result_buf points to valid, properly aligned memory for writing a pointer
• result_len points to valid, properly aligned memory for writing a usize
• These pointers remain valid for the duration of the call
• The pointers are not aliased (no other mutable references exist)