Function read_logical_file_bytes 

pub fn read_logical_file_bytes(
    vfs: &mut Vfs,
    vm_session: &mut SessionHolder,
    path: &str,
) -> Result<Vec<u8>, WorkspaceReadError>

Read file bytes for a logical path: guest-primary (γ or β) first, else in-memory Vfs.

Errors

Returns WorkspaceReadError when guest/VFS reads fail or the path is outside workspace.