[Backport 2.5] add missing ctx variables (#710)

[jowg-amazon]

Description

Backport #710 to 2.5

Ran security analytics and alerting tests locally with these changes.

Issues Resolved

[List any issues this PR will resolve]

Check List

• [ ] New functionality includes testing.
  • [ ] All tests pass
• [ ] New functionality has been documented.
  • [ ] New functionality has javadoc added
• [ ] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license. For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[jowg-amazon]

closing in favor of: https://github.com/opensearch-project/common-utils/pull/722