refactor(subc): ignore RouteBind config via .. for protocol forward-compat

AFT already reads config from CortexKit files and discards any wire-relayed
config tiers, but the RouteBind match arm still bound the `config` field by name
(then dropped it). When subc-protocol removes the now-dead `config` field from
RouteOpen/RouteBind, that named binding would stop compiling. Switching the
destructure to `..` ignores the field whether the protocol version still carries
it or has dropped it, so the upstream field removal can land in either order
without breaking AFT's build. Behavior is unchanged — the field was already
ignored.

Co-authored-by: Alfonso <289616620+alfonso-aft@users.noreply.github.com>

Author: ualtinok

crates/aft/src/subc.rs

@@ -1461,7 +1461,11 @@ async fn handle_control_request(
             route_channel,
             target: _,
             identity,
-            config,
+            // Any wire-relayed `config` field is ignored via `..`: AFT reads config
+            // from CortexKit files, never the wire. `..` keeps this tolerant whether
+            // the protocol version still carries the field or has dropped it, so a
+            // protocol field-removal cannot break this destructure either way.
+            ..
         } => {
             let route_id = route_key(route_channel);
             if pending_binds.contains_key(&route_id) {
@@ -1502,10 +1506,9 @@ async fn handle_control_request(
             // harness binding a project gets the identical on-disk config, so two
             // trust domains sharing the per-root actor can never diverge or
             // inherit each other's capabilities (the cross-bind escalation class).
-            // The `config` field on the wire is accepted by the protocol but no
-            // longer consulted; the per-tier trust boundary (user trusted, project
+            // Wire-relayed config tiers (if the protocol still carries them) are
+            // ignored entirely; the per-tier trust boundary (user trusted, project
             // privileged-dropped) is applied to the FILE tiers in handle_configure.
-            let _ = &config; // wire config intentionally ignored — see above.
             let local_tiers = crate::subc_config::read_local_cortexkit_config_tiers(
                 user_config_path,
                 Path::new(&bind_project_root),