Third-party code shipped with the training payload (isaaclab_targets_design.md IT-D7).

rsl_rl/                    rsl-rl-lib 5.5.1 (BSD-3-Clause, see rsl_rl/LICENSE.txt), unmodified, from PyPI.
unitport_isaaclab_rl_cfg/  rl_cfg.py, rnd_cfg.py, symmetry_cfg.py from Isaac Lab v3.0.0 source/isaaclab_rl/isaaclab_rl/rsl_rl/
                           (BSD-3-Clause, see LICENSE.txt), unmodified.

Used only where the installed Isaac Lab ships an older RSL-RL (Isaac Lab 2.3.x ships 3.1.2).
