Constant DFSP_ACTIVATION_HEIGHT 

pub const DFSP_ACTIVATION_HEIGHT: u64 = u64::MAX; // 18_446_744_073_709_551_615u64

Block height at which DFSP (decentralized fraud/slashing protocol) features activate.

Decision: Defaults to u64::MAX so DFSP is effectively off until governance updates this constant; crate::types::header::L2BlockHeader auto-versioning (BLK-007) treats this as “always pre-DFSP” in the default configuration.