Struct Decision 

pub struct Decision {
    pub observe: String,
    pub decision: String,
    pub grounds: Vec<Ground>,
    pub blame: String,
    pub authority: Option<String>,
    pub jurisdiction: Option<String>,
    pub source_ref: Option<Value>,
    pub provenance: Option<String>,
}

An assembled, validated decision ready to be appended to the ledger — the single shape both ev decide (capture.rs) and ev migrate (migrate.rs) hand to append. It carries exactly the hashed payload (observe, decision, grounds) plus the bookkeeping fields; append owns the one compute_id / write_tick / R3-lint path so neither caller can fork the hashing.

Fields

observe: String

decision: String

grounds: Vec<Ground>

blame: String

authority: Option<String>

jurisdiction: Option<String>

source_ref: Option<Value>

provenance: Option<String>