Constant SNP_FAMILY_ID 

pub const SNP_FAMILY_ID: [u8; 16];

SNP family identifier for OpenHCL guests.

Layout convention:

• byte[3] == 0x01 identifies OpenHCL.
• all other bytes are reserved and must remain 0x00.

This value is baked into externally-consumed SNP ID blocks; changing it alters attestation identity, so any edit must be deliberate.