Correct compaction period comments

[wodeyoulai]

As a new contributor getting familiar with the codebase for the first time, I noticed some inconsistencies in the comments describing the compaction period timing.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[k8s-ci-robot]

Hi @wodeyoulai. Thanks for your PR.

I'm waiting for a etcd-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[wodeyoulai]

Related to #19017

[ahrtr]

Please signoff the commit,

git rebase HEAD~2 --signoff
git push --force-with-lease origin main

[wodeyoulai]

Please signoff the commit,

git rebase HEAD~2 --signoff
git push --force-with-lease origin main

Thanks! I'll make the adjustments later.

[wodeyoulai]

Please signoff the commit,

git rebase HEAD~2 --signoff
git push --force-with-lease origin main

@ahrtr cc

[ahrtr]

/ok-to-test

[ahrtr]

Please squash the commits

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.78%. Comparing base (2f37f48) to head (7da675a).

Additional details and impacted files

Files with missing lines	Coverage Δ
server/etcdserver/api/v3compactor/periodic.go	90.24% <ø> (ø)

... and 22 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19192      +/-   ##
==========================================
- Coverage   68.80%   68.78%   -0.02%     
==========================================
  Files         420      420              
  Lines       35650    35650              
==========================================
- Hits        24529    24522       -7     
- Misses       9694     9706      +12     
+ Partials     1427     1422       -5     

---

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[ahrtr]

We fixed some test issues, please rebase this PR, thx

[wodeyoulai]

We fixed some test issues, please rebase this PR, thx

We fixed some test issues, please rebase this PR, thx

Finished

[k8s-ci-robot]

@wodeyoulai: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-etcd-integration-1-cpu-arm64	7da675a	link	true	/test pull-etcd-integration-1-cpu-arm64

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.