message: add include to DUCKDB_AMALGAMATION
diff: #include "duckdb/common/types/timestamp.hpp"
  #include "duckdb/common/serializer/buffered_serializer.hpp"
  #include "duckdb/common/operator/comparison_operators.hpp"
  +#include "duckdb/common/string_map_set.hpp"
  #endif
  #include "snappy.h"
  #include "miniz_wrapper.hpp"
  #include "zstd.h"
  -#include "duckdb/common/string_map_set.hpp"
  namespace duckdb {
  