Investigate whether Ros2TraceAnalyzer is compatible with recent improvements to ROS 2 Tracing

[wentasah]

The details are described at https://discourse.openrobotics.org/t/gsoc-2025-improvements-to-ros-2-tracing/50063/1, specifically in section Solution 3: Dual Session Tracing.

[christophebedard]

If you use the dual-session feature, you get 2 traces: one trace from the snapshot session that contains initialization trace data and one trace that contains normal "runtime" trace data. The two trace directories are separate, but they are placed in the same directory. You can generally (e.g., with babeltrace2) just import the parent directory and it will behave as one logical trace.