style: cargo fmt for v1.7.99-alpha release gate

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

core/archipelago/src/trust/signed_doc.rs

@@ -60,7 +60,13 @@ pub fn verify_detached(doc: &Value) -> Result<SignatureStatus> {
     let signed_by = obj
         .get(SIGNED_BY_FIELD)
         .and_then(Value::as_str)
-        .ok_or_else(|| anyhow!("signed document has `{}` but no `{}`", SIGNATURE_FIELD, SIGNED_BY_FIELD))?;
+        .ok_or_else(|| {
+            anyhow!(
+                "signed document has `{}` but no `{}`",
+                SIGNATURE_FIELD,
+                SIGNED_BY_FIELD
+            )
+        })?;
 
     let signer = did::ed25519_pubkey_from_did_key(signed_by)
         .with_context(|| format!("invalid `{}` did:key", SIGNED_BY_FIELD))?;
@@ -174,7 +180,10 @@ mod tests {
     #[test]
     fn tampered_payload_is_rejected() {
         let mut signed = sign_into(&test_key(), json!({"schema": 1, "n": 42}));
-        signed.as_object_mut().unwrap().insert("n".into(), json!(43));
+        signed
+            .as_object_mut()
+            .unwrap()
+            .insert("n".into(), json!(43));
         assert!(verify_detached(&signed).is_err());
     }