chore: use iwyu on data_structures/**.cpp

data_structures/dsu_path_compression.cpp

@@ -18,10 +18,12 @@
  * @see dsu_union_rank.cpp
  */
 
-#include <cassert>   /// for assert
-#include <cstdint>   /// for integral typedefs
-#include <iostream>  /// for IO operations
-#include <vector>    /// for std::vector
+#include <cassert>    // for assert
+#include <cstdint>    // for uint64_t
+#include <iostream>   // for char_traits, basic_ostream, operator<<, cout, endl
+#include <vector>     // for vector
+#include <algorithm>  // for max, min
+#include <utility>    // for swap
 
 using std::cout;
 using std::endl;