Struct AuditRowForHashing 

pub struct AuditRowForHashing<'a> {
    pub created_at: i64,
    pub action: &'a str,
    pub actor_did: &'a str,
    pub target: Option<&'a str>,
    pub target_cid: Option<&'a str>,
    pub outcome: &'a str,
    pub reason: Option<&'a str>,
}

Borrowed view of an audit row’s hash-relevant content.

Field set is the audit_log columns minus the SQL/chain plumbing (id, prev_hash, row_hash). Optional columns are Option<&str>; absence is encoded as field-omission in the canonical CBOR (matching the §6.2 / @atproto/api convention of “absent != null”).

Fields

created_at: i64

Internal wall-clock epoch-ms (matches the created_at INTEGER column).

action: &'a str

Audit-action discriminator (e.g. "label_applied").

actor_did: &'a str

DID of the moderator/admin/operator that triggered the action.

target: Option<&'a str>

Optional target identifier (AT-URI, DID, report id, etc.).

target_cid: Option<&'a str>

Optional CID pin on the target.

outcome: &'a str

"success" or "failure".

reason: Option<&'a str>

Optional structured-JSON or free-text payload.