Imports the proper module for get_stage_id

[rwiltz]

Description

An Isaac Sim import path changed in Isaac Lab which broke a fragile import in xr_anchor_utils. This change fixed the import.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I have read and understood the contribution guidelines
• I have run the pre-commit checks with ./isaaclab.sh --format
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have updated the changelog and the corresponding version in the extension's config/extension.toml file
• I have added my name to the CONTRIBUTORS.md or my name already exists there

[greptile-apps]

Greptile Overview

Greptile Summary

This PR fixes a broken import in Isaac Lab's XR anchor utilities module that occurred due to an Isaac Sim import path change. The fix updates the import statement for get_current_stage_id from accessing it through the broader isaaclab.sim module to directly importing it from its specific location at isaaclab.sim.utils.stage. The change makes the import more explicit and robust, following better Python practices by importing exactly what's needed rather than relying on indirect module access.

The fix includes the necessary version bump from 0.48.6 to 0.48.7 and corresponding changelog entry, following the project's semantic versioning conventions for bug fixes. This change integrates well with Isaac Lab's module structure and addresses the fragility that occurred when external dependencies changed their internal organization.

Important Files Changed

Filename	Score	Overview
source/isaaclab/config/extension.toml	5/5	Version bump from 0.48.6to0.48.7 following semantic versioning for bug fix
source/isaaclab/docs/CHANGELOG.rst	5/5	Added changelog entry documenting the import path fix for stage context propagation
source/isaaclab/isaaclab/devices/openxr/xr_anchor_utils.py	5/5	Fixed broken import by directly importing get_current_stage_id from specific module path

Confidence score: 5/5

• This PR is safe to merge with minimal risk of breaking functionality
• Score reflects a straightforward import fix with proper documentation and versioning
• No files require special attention as all changes are clean and well-documented

[greptile-apps]

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