Warning: This build has drifted.
The coverage report for this pull request build may be inaccurate because its base commit is no longer the HEAD of its target branch.
This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

    • Learn more: For more information on this, see Tracking coverage changes for pull request builds.
    • Fix now: For a quick fix, rebase this PR at GitHub. Your next report should be accurate.
    • Prevent going forward: To avoid this issue with future PRs, see these Recommended CI Configurations.

refactor: extract helper functions to reduce duplication in NodeGetInfo

Extract three helpers from the zone lookup/retry logic:
- handleZoneLookupResult: common error handling for GetNodeInfoFromLabels
  (transient error → clear for retry, empty zone → check region-only)
- isRegionOnlyNode: checks region label to detect non-zonal nodes
- waitForZoneLabel: polling loop with backoff, permanent error detection,
  context cancellation, and non-zonal early exit

This reduces ~80 lines of duplicated inline logic to ~40 lines of
shared, testable functions.