fix: add missing dependency

proost · proost · commit 99d06bfd2b3c · 2026-01-13T02:10:05.000+09:00
diff --git a/tdigest/include/tdigest_impl.hpp b/tdigest/include/tdigest_impl.hpp
@@ -22,6 +22,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include <sstream>
 
 #include "common_defs.hpp"
 #include "memory_operations.hpp"
