server/handler: register missing http handlers related to ingest param (#63099)

[ti-chi-bot]

This is an automated cherry-pick of #63099

What problem does this PR solve?

Issue Number: ref #61553

Problem Summary:

When I cherry-pick #61622 to master(#61555), the http handler registering part is missed. We can't modify the ingest parameters through http API.

What changed and how does it work?

Register missing http handlers related to ingest param.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

❯ curl http://127.0.0.1:10080/ingest/max-batch-split-ranges
{
 "is_null": false,
 "value": 2048
}% 
❯ curl http://127.0.0.1:10080/ingest/max-batch-split-ranges -X POST -d '{"value": 1}'
{
 "message": "success"
}%                                                                              
❯ curl http://127.0.0.1:10080/ingest/max-batch-split-ranges
{
 "is_null": false,
 "value": 1
}%                                                                         
❯ curl http://127.0.0.1:10080/ingest/max-split-ranges-per-sec -X POST -d '{"value": 123}'
{
 "message": "success"
}%                                                                              
❯ curl http://127.0.0.1:10080/ingest/max-ingest-inflight -X POST -d '{"value": 5}'
{
 "message": "success"
}%                                                                              
❯ curl http://127.0.0.1:10080/ingest/max-ingest-per-sec -X POST -d '{"value": 0.35}'
{
 "message": "success"
}% 

[2025/08/20 17:34:25.600 +08:00] [INFO] [local.go:1232] ["start import engine"] [task-id=3] [task-key=ddl/backfill/120] [subtaskID=3] [step=read-index] [uuid=59619405-c4b5-56d9-8335-6527f473cadd] ["region ranges"=1] [count=1] [size=38] [maxReqInFlight=5] [maxReqPerSec=0.35]
[2025/08/20 17:34:25.600 +08:00] [INFO] [local.go:918] ["import engine ranges"] [task-id=3] [task-key=ddl/backfill/120] [subtaskID=3] [step=read-index] [len(regionSplitKeys)=2] [splitRangesBatch=1] [splitRangePerSec=123]

• 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

[ti-chi-bot]

@tangenta This PR has conflicts, I have hold it.
Please resolve them or ask others to resolve them, then comment /unhold to remove the hold label.

[ti-chi-bot]

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[codecov]

Codecov Report

❌ Patch coverage is 88.00000% with 3 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (release-8.5@a8777b2). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.5     #63485   +/-   ##
================================================
  Coverage               ?   57.3525%           
================================================
  Files                  ?       1783           
  Lines                  ?     634563           
  Branches               ?          0           
================================================
  Hits                   ?     363938           
  Misses                 ?     246282           
  Partials               ?      24343           

Flag	Coverage Δ
integration	37.4804% <88.0000%> (?)
unit	72.8098% <88.0000%> (?)

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

Components	Coverage Δ
dumpling	52.9278% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	52.8329% <0.0000%> (?)

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[tangenta]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, tangenta

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

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Needs approval from an approver in each of these files:

• OWNERS [D3Hunter,tangenta]
• pkg/lightning/OWNERS [D3Hunter]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-09-16 03:11:34.996481063 +0000 UTC m=+935761.556362550: ☑️ agreed by tangenta.
• 2025-09-16 03:46:39.305698458 +0000 UTC m=+937865.865579965: ☑️ agreed by D3Hunter.

[tangenta]

/retest

[tangenta]

/retest

[tangenta]

/retest

[Benjamin2037]

/retest

[Benjamin2037]

/retest

[Benjamin2037]

/retest

[tangenta]

/retest

[tangenta]

/retest

[tangenta]

/retest