feat: rotate frame timestamp CSV files

orbbec_camera/include/orbbec_camera/frame_timestamp_csv_logger.h

@@ -10,6 +10,7 @@
 #include <memory>
 #include <mutex>
 #include <optional>
+#include <string>
 #include <thread>
 #include <unordered_map>
 #include <vector>
@@ -139,18 +140,22 @@ class FrameTimestampCsvLogger {
   static std::string csvHeader();
 
   void writerThreadMain();
-  void openCsvIfNeeded();
+  std::string csvFilePathForIndex(uint64_t file_index) const;
+  bool openCsvFile(uint64_t file_index);
+  bool rotateCsvFile();
 
   rclcpp::Logger logger_;
   bool enabled_ = false;
   bool csv_enabled_ = false;
   bool drop_log_enabled_ = false;
   std::atomic_bool shutdown_requested_{false};
-  bool csv_writer_failed_ = false;
+  std::atomic_bool csv_writer_failed_{false};
   bool queue_warning_active_ = false;
   std::string csv_file_path_;
   std::ofstream csv_stream_;
   std::thread writer_thread_;
+  uint64_t csv_file_index_ = 0;
+  uint64_t csv_rows_written_ = 0;
 
   uint64_t next_row_id_ = 1;
   std::unordered_map<uint64_t, PendingRow> pending_rows_;