Add E2E-based breaking change detection via CI

[Aaravanand00]

Summary
This PR introduces a simple breaking change detection mechanism by running the existing E2E integration tests in CI.

What’s changed

1. Added a GitHub Actions workflow to run integration tests on pull requests and pushes to main
2. Uses the existing npm run integration command as the source of truth for E2E validation
3. The workflow fails if integration tests fail, helping catch potential breaking changes early
4. Added a short note in the README about E2E-based breaking change detection

Why this approach
Instead of introducing additional tooling, this relies on the current integration test setup as a practical signal for breaking changes, which keeps the solution simple and aligned with how the project is already tested.

Notes

1. The workflow currently uses the sdk-ts runner, aligned with the existing CI setup for Linux environments
2. Other SDK runners (swift, kmp) may require platform-specific setups or are not part of the current CI flow, so they are not included here

[Copilot]

Pull request overview

Adds an additional CI signal intended to catch breaking changes earlier by running the repository’s existing E2E integration test entrypoint (npm run integration) on PRs and pushes to main.

Changes:

• Added a new GitHub Actions workflow to run E2E integration tests in CI.
• Updated README with a brief note about CI-based E2E breaking change detection.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
README.md	Documents that E2E tests run in CI for breaking-change detection.
.github/workflows/e2e-breaking-check.yml	Introduces a PR/push workflow intended to execute npm run integration -- --runner sdk-ts.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud