importinto: add doc for conflict resolve

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #60621

Problem Summary:

What changed and how does it work?

Check List

Tests

• [ ] Unit test
• [ ] Integration test
• [ ] Manual test (add detailed scripts or steps below)
• [x] No need to test. ONLY add tech doc

  • [x] 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[bot]]

Hi @D3Hunter. Thanks for your PR.

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[D3Hunter]

/retest

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[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 68.7466%. Comparing base (dc7e08f) to head (708bb46). :warning: Report is 7 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #64987        +/-   ##
================================================
- Coverage   70.9257%   68.7466%   -2.1791%     
================================================
  Files          1888       1866        -22     
  Lines        515892     509386      -6506     
================================================
- Hits         365900     350186     -15714     
- Misses       125576     136878     +11302     
+ Partials      24416      22322      -2094     

Flag	Coverage Δ
integration	41.6438% <ø> (-6.5101%)	:arrow_down:
unit	65.9743% <ø> (+0.3224%)	:arrow_up:

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

Components	Coverage Δ
dumpling	52.8700% <ø> (ø)
parser	∅ <ø> (∅)
br	39.1471% <ø> (-20.2606%)	:arrow_down:

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[D3Hunter]

/retest

[tiprow[bot]]

@D3Hunter: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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.

[D3Hunter]

/retest

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@D3Hunter: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

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[D3Hunter]

@lance6716 ptal

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2025-12-11 08:52:55.482158066 +0000 UTC m=+1117520.295935628: :ballot_box_with_check: agreed by fzzf678.
• 2025-12-12 02:46:51.223631545 +0000 UTC m=+1181956.037409137: :ballot_box_with_check: agreed by lance6716.

[D3Hunter]

/unhold

[D3Hunter]

/approve

[D3Hunter]

/retest

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, fzzf678, lance6716

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• ~~pkg/disttask/OWNERS~~ [D3Hunter]

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[tiprow[bot]]

@D3Hunter: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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.