Fails to build likely(?) with >=clang-19
SymbolGuardian.cpp:19:7: error: no member named 'unique_lock' in namespace 'std'
--- a/pcsx2/DebugTools/SymbolGuardian.h
+++ b/pcsx2/DebugTools/SymbolGuardian.h
@@ -6,2 +6,3 @@
 #include <atomic>
+#include <mutex>
 #include <thread>