Enable auto reviewer assignment

[dstrome]

Add client id and private key variables to AutoLabelAssignment.yml. Explicitly define action call types and add ready_for_review type.

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 issues. Other issues are also a high priority. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

More information about PoliCheck

Information: PoliCheck | Severity Guidance | Term
For any questions: Try searching the learn.microsoft.com contributor guides or post your question in the Learn support channel.

[learn-build-service-prod]

Learn Build status updates of commit 11c37eb:

✅ Validation status: passed

File	Status	Preview URL	Details
.github/workflows/AutoLabelAssign.yml	✅Succeeded
.github/workflows/BackgroundTasks.yml	✅Succeeded

For more details, please refer to the build report.