Add check for closed workflow in workflow repair service

[sks1995]

Pull Request type

• [x] Bugfix
• [ ] Feature
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes (Please run ./gradlew generateLock saveLock to refresh dependencies)
• [ ] WHOSUSING.md
• [ ] Other (please describe):

NOTE: Please remember to run ./gradlew spotlessApply to fix any format violations.

Changes in this PR Added check for null object before proceeding with processing.

Describe the new behavior from this PR, and why it's needed Issue # https://github.com/Netflix/conductor/issues/3312

Alternatives considered

Describe alternative implementation you have considered

[sks1995]

@apanicker-nflx Requesting your review

[sks1995]

@apanicker-nflx Requesting your review

@apanicker-nflx Can you help with review ?

[github-actions[bot]]

This PR is stale, because it has been open for 45 days with no activity. Remove the stale label or comment, or this will be closed in 7 days.

[github-actions[bot]]

This PR was closed, because it has been stalled for 7 days with no activity.