Fix build with Boost 1.89.0 (#7220)

Author: cho-m

include/server/connection.hpp

@@ -8,6 +8,7 @@
 
 #include <boost/array.hpp>
 #include <boost/asio.hpp>
+#include <boost/asio/deadline_timer.hpp>
 #include <boost/config.hpp>
 #include <boost/version.hpp>
 

src/engine/plugins/tile.cpp

@@ -10,7 +10,9 @@
 #include <boost/geometry.hpp>
 #include <boost/geometry/geometries/geometries.hpp>
 #include <boost/geometry/geometries/point_xy.hpp>
+#if __has_include(<boost/geometry/multi/geometries/multi_linestring.hpp>)
 #include <boost/geometry/multi/geometries/multi_linestring.hpp>
+#endif
 
 #include <vtzero/builder.hpp>
 #include <vtzero/geometry.hpp>