fix: RootPlanarClusterWriter truncates output (#1047)

The `RootPlanarClusterWriter` uses 32bit integers to write out our barcodes. They are 64bit however, meaning they get truncated to 32bit on write.

This PR makes the writer use 64bit unsigned integers to write out.

Examples/Io/Root/include/ActsExamples/Io/Root/RootPlanarClusterWriter.hpp

@@ -92,14 +92,13 @@ class RootPlanarClusterWriter
   std::vector<float> m_cell_data;  ///< local cell position y
 
   // (optional) the truth position
-  std::vector<float> m_t_gx;  ///< truth position global x
-  std::vector<float> m_t_gy;  ///< truth position global y
-  std::vector<float> m_t_gz;  ///< truth position global z
-  std::vector<float> m_t_gt;  ///< truth time t
-  std::vector<float> m_t_lx;  ///< truth position local x
-  std::vector<float> m_t_ly;  ///< truth position local y
-  std::vector<unsigned long>
-      m_t_barcode;  ///< associated truth particle barcode
+  std::vector<float> m_t_gx;          ///< truth position global x
+  std::vector<float> m_t_gy;          ///< truth position global y
+  std::vector<float> m_t_gz;          ///< truth position global z
+  std::vector<float> m_t_gt;          ///< truth time t
+  std::vector<float> m_t_lx;          ///< truth position local x
+  std::vector<float> m_t_ly;          ///< truth position local y
+  std::vector<uint64_t> m_t_barcode;  ///< associated truth particle barcode
 };
 
 }  // namespace ActsExamples

Examples/Io/Root/src/RootPlanarClusterWriter.cpp

@@ -74,7 +74,7 @@ ActsExamples::RootPlanarClusterWriter::RootPlanarClusterWriter(
   m_outputTree->Branch("truth_g_t", &m_t_gt);
   m_outputTree->Branch("truth_l_x", &m_t_lx);
   m_outputTree->Branch("truth_l_y", &m_t_ly);
-  m_outputTree->Branch("truth_barcode", &m_t_barcode, "truth_barcode/l");
+  m_outputTree->Branch("truth_barcode", &m_t_barcode);
 }
 
 ActsExamples::RootPlanarClusterWriter::~RootPlanarClusterWriter() {}