unistore: support return _tidb_commit_ts for coprocessor request | tidb-test=feature/active-active tikv=feature/active-active

[tiancaiamao]

What problem does this PR solve?

Issue Number: close #65106

Problem Summary:

What changed and how does it work?

tikv has supported _tidb_commt_ts tikv/tikv#19166
now this commit handle the same thing in unistore

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @tiancaiamao. Thanks for your PR.

PRs from untrusted users cannot be marked as trusted with /ok-to-test in this repo meaning untrusted PR authors can never trigger tests themselves. Collaborators can still trigger tests on the PR using /test all.

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[codecov]

Codecov Report

❌ Patch coverage is 72.41379% with 8 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (feature/active-active@e352f59). Learn more about missing BASE report.

Additional details and impacted files

@@                    Coverage Diff                     @@
##             feature/active-active     #65107   +/-   ##
==========================================================
  Coverage                         ?   73.3462%           
==========================================================
  Files                            ?       1860           
  Lines                            ?     508164           
  Branches                         ?          0           
==========================================================
  Hits                             ?     372719           
  Misses                           ?     113236           
  Partials                         ?      22209           

Flag	Coverage Δ
integration	41.9179% <34.4827%> (?)
unit	72.2547% <72.4137%> (?)

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

Components	Coverage Δ
dumpling	52.8700% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	46.3377% <0.0000%> (?)

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lcwangchao

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Needs approval from an approver in each of these files:

• OWNERS [lcwangchao]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-12-18 06:20:45.827509667 +0000 UTC m=+1713190.641287269: ☑️ agreed by lcwangchao.

[tiancaiamao]

/retest

[tiprow]

@tiancaiamao: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

Details

In response to this:

/retest

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