redesign sshsigchain authority protocol

crates/geth-control/src/lib.rs

@@ -746,10 +746,11 @@ pub enum ControlResponse {
         chain_id: String,
         records: usize,
         head: String,
-        active_admin_keys: usize,
-        users: usize,
+        active_keys: usize,
         devices: usize,
-        nodes: usize,
+        disclosed_profiles: usize,
+        incomplete_profiles: usize,
+        anchor_threshold: u16,
         note: String,
     },
     KeychainExplained {