[RL] Update RSL-RL to 5.5.1

[StafaH]

Description

Updates the rsl-rl-lib pin from 5.4.1 to 5.5.1 and removes the redundant direct onnxscript dependency, which RSL-RL already provides.

This is the dependency-only portion of #7784; no compatibility shims, tests, or runtime code are changed.

Type of change

• Dependency update

Release backport

• Backport this pull request to the active release branch after it merges into develop

Screenshots

Not applicable.

Validation

• uv lock --check
• uv run isaaclab -f
• uv run python -m pytest source/isaaclab_rl/test/test_rsl_rl_cfg_deprecation.py -q (39 passed)

Checklist

• I have read and understood the contribution guidelines
• I have run the pre-commit checks with uv run isaaclab -f
• Documentation changes are not required for this dependency-only update
• My changes generate no new warnings
• Existing compatibility tests cover this dependency-only update
• A changelog fragment is not required because no source package is changed
• My name already exists in CONTRIBUTORS.md

[isaaclab-review-bot]

Isaac Lab Review Bot

The dependency-only update consistently pins rsl-rl-lib 5.5.1 in the base dependencies and rsl-rl extra, with corresponding lockfile updates. The removed direct onnxscript declaration remains satisfied transitively by RSL-RL.

• Design and architecture: Dependency ownership is simplified without introducing version skew: both RSL-RL declarations use 5.5.1, and onnxscript is delegated to the RSL-RL package that requires it. The lockfile confirms that dependency remains in the resolved graph.
• API: No public Python API, CLI argument, or configuration field changes. Project metadata and the generated lockfile agree for the base and optional-extra dependency paths, and no source-package changelog or documentation update is required.
• Implementation: The updated lock entry for rsl-rl-lib 5.5.1 retains onnxscript transitively. Although RSL-RL no longer brings in torchvision, the project continues to declare it directly. The remaining tradeoff is that the minimum supported onnxscript version is now controlled by RSL-RL rather than an Isaac Lab constraint.

No blocking issues. No inline issue met the actionable-evidence threshold; the assessment above records the review feedback.

Automated review; human maintainers own approval decisions.

[greptile-apps]

Confidence Score: 5/5

The dependency update appears safe to merge, with no concrete compatibility, packaging, or security regression identified.

Summary

This PR updates the default and optional RSL-RL dependency pins from 5.4.1 to 5.5.1 and synchronizes the lockfile.

• Removes redundant direct onnxscript declarations while retaining it transitively through RSL-RL.
• Updates the locked RSL-RL artifacts and dependency metadata.
• Keeps torchvision available through the root project’s existing direct dependency.

_{Reviews (1) · Last reviewed commit: "Update RSL-RL to 5.5.1"}

[StafaH]

run-ci