Add end to end tests for system metrics

[gingerbenw]

Goal

This PR adds end-to-end tests for system metrics in the React Native integration. The changes enable CPU, memory, and rendering metrics collection and provide test infrastructure to verify these metrics are properly captured.

Changeset

• Added a new test step to validate span attributes in traces
• Updated iOS configuration to enable individual system metrics (CPU, memory, rendering)
• Refactored Docker Compose environment variable placement

[github-actions]

Browser bundle size

NPM build

	Package
Before	235.35 kB
After	235.35 kB
±	No change

CDN build

	Unminified	Minfied	Minified + gzipped
Before	119.43 kB	46.18 kB	13.29 kB
After	119.43 kB	46.18 kB	13.29 kB
±	No change	No change	No change

Code coverage

Coverage values did not change👌.

Total:

Lines	Branches	Functions	Statements
84.94%(+0%)	63.87%(+0%)	75.79%(+0%)	81.75%(+0%)

Generated against 4e98ca8 on 18 November 2025 at 15:31:20 UTC

[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.