Fix build on Fedora 43: add missing <cstdint> include

string_util.h uses uint64_t in FormatSize() but does not include
<cstdint>. This happens to compile on most platforms because other
headers transitively include it, but fails on Fedora 43 (GCC 15)
where the transitive include was removed.

Fixes #856.

Author: Chessing234

src/include/common/util/string_util.h

@@ -12,6 +12,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
 #include <vector>