koordlet: fix prediction restore for node priorities

[saintube]

Ⅰ. Describe what this PR does

koordlet: fix the failures of prediction restore for node priorities' checkpoints.

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

V. Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in make test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (08b6e89) 66.10% compared to head (e4b2921) 66.11%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1749      +/-   ##
==========================================
+ Coverage   66.10%   66.11%   +0.01%     
==========================================
  Files         388      388              
  Lines       42379    42388       +9     
==========================================
+ Hits        28014    28025      +11     
- Misses      12292    12293       +1     
+ Partials     2073     2070       -3     

Flag	Coverage Δ
unittests	66.11% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[hormes]

/lgtm
/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hormes

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/koordlet/OWNERS [hormes]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment