Add per-route details to status, move socket to /srv/mc-proxy/

mcproxyctl status now shows individual routes per listener with
hostname, backend, mode, and re-encrypt indicator. Proto, gRPC
server, client library, and CLI all updated.

Default gRPC socket path moved from /var/run/mc-proxy.sock to
/srv/mc-proxy/mc-proxy.sock to match the service data directory
convention.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

internal/grpcserver/grpcserver.go

@@ -434,12 +434,23 @@ func (a *AdminServer) GetStatus(_ context.Context, _ *pb.GetStatusRequest) (*pb.
 	var listeners []*pb.ListenerStatus
 	for _, ls := range a.srv.Listeners() {
 		routes := ls.Routes()
+		var pbRoutes []*pb.Route
+		for hostname, route := range routes {
+			pbRoutes = append(pbRoutes, &pb.Route{
+				Hostname:          hostname,
+				Backend:           route.Backend,
+				Mode:              route.Mode,
+				BackendTls:        route.BackendTLS,
+				SendProxyProtocol: route.SendProxyProtocol,
+			})
+		}
 		listeners = append(listeners, &pb.ListenerStatus{
 			Addr:              ls.Addr,
 			RouteCount:        int32(len(routes)),
 			ActiveConnections: ls.ActiveConnections.Load(),
 			ProxyProtocol:     ls.ProxyProtocol,
 			MaxConnections:    ls.MaxConnections,
+			Routes:            pbRoutes,
 		})
 	}