Function enrich_project_ir_code_bytes 

pub async fn enrich_project_ir_code_bytes(
    ir: &mut ProjectIr,
    root: &Path,
    files: &[ParsedFile],
    config: &CompressorConfig,
) -> Result<(), CompressError>

Fill code_bytes on IR symbol nodes via the RedCompressor HTTP API (same as Neo4j persist path).