Manual backport of: https://github.com/boostorg/mysql/pull/475

--- boost_1_88_0/boost/mysql/metadata.hpp~	2025-04-03 13:37:28.000000000 +0200
+++ boost_1_88_0/boost/mysql/metadata.hpp	2025-05-06 23:03:30.772695192 +0200
@@ -15,6 +15,7 @@
 #include <boost/mysql/detail/coldef_view.hpp>
 #include <boost/mysql/detail/flags.hpp>
 
+#include <cstdint>
 #include <string>
 
 namespace boost {
--- boost_1_88_0/boost/mysql/impl/internal/protocol/static_buffer.hpp~	2025-04-03 13:37:28.000000000 +0200
+++ boost_1_88_0/boost/mysql/impl/internal/protocol/static_buffer.hpp	2025-05-06 23:04:12.609390270 +0200
@@ -14,6 +14,7 @@
 #include <boost/core/span.hpp>
 
 #include <array>
+#include <cstdint>
 #include <cstring>
 
 namespace boost {