Function patch_seq_compress_gzip_level 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn patch_seq_compress_gzip_level(
    stack: Stack,
) -> Stack

Compress data using gzip with specified compression level

Stack effect: ( String Int – String Bool )

Level should be 1-9 (1=fastest, 9=best compression). Returns base64-encoded compressed data and success flag.

Safety

Stack must have Int and String values on top