server: replace session in statsHistoryHandler with types.Context

[YangKeao]

What problem does this PR solve?

Issue Number: close #56782

Problem Summary:

A simple tidy PR, it removes an use of session and replace it with a types.Context.

What changed and how does it work?

Instead of creating a fully functional session, it creates a types.Context instead.

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.
    It has been covered by TestDumpStatsAPI test.

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.6148%. Comparing base (c066620) to head (62cf19d).
Report is 8 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #56783         +/-   ##
=================================================
- Coverage   73.3924%   56.6148%   -16.7777%     
=================================================
  Files          1635       1761        +126     
  Lines        452733     634056     +181323     
=================================================
+ Hits         332272     358970      +26698     
- Misses       100104     250964     +150860     
- Partials      20357      24122       +3765     

Flag	Coverage Δ
integration	37.3055% <0.0000%> (?)
unit	72.7353% <100.0000%> (+0.2093%)	⬆️

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

Components	Coverage Δ
dumpling	52.9478% <ø> (ø)
parser	∅ <ø> (∅)
br	52.7108% <ø> (+6.7037%)	⬆️

[YangKeao]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, lcwangchao

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• OWNERS [hawkingrei,lcwangchao]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-10-22 13:21:04.092247848 +0000 UTC m=+357264.789038459: ☑️ agreed by hawkingrei.
• 2024-10-23 09:26:26.33669729 +0000 UTC m=+429587.033487895: ☑️ agreed by lcwangchao.