Add SSH proxy authorization probe

crates/geth-ssh-proxy/src/lib.rs

@@ -1,4 +1,4 @@
-use geth_types::{NodeId, ResourceId};
+use geth_types::{NodeId, ResourceId, UnixMillis};
 use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
@@ -7,6 +7,15 @@ pub struct SshProxyTarget {
     pub node: NodeId,
 }
 
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct SshProxyConnection {
+    pub target_node: NodeId,
+    pub connected_at: UnixMillis,
+    pub local_sshd_target: Option<String>,
+    pub admin_shell_available: bool,
+    pub note: String,
+}
+
 #[must_use]
 pub fn ssh_proxy_roadmap() -> &'static str {
     "future SSH proxy carries SSH protocol bytes over authorized Iroh streams; SSH is not a geth transport"