planner: add cascade basic interface definition and basic task type.

[AilinKid]

What problem does this PR solve?

Issue Number: ref #51664

Problem Summary:

What changed and how does it work?

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.

when the scheduler part is on, it will be more easier to test the memo workflow, currently single task couldn't run itself

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]

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[codecov]

Codecov Report

Attention: Patch coverage is 19.84127% with 101 lines in your changes missing coverage. Please review.

Project coverage is 73.9627%. Comparing base (ba55be5) to head (0cf0274).
Report is 29 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #57981        +/-   ##
================================================
+ Coverage   73.2262%   73.9627%   +0.7364%     
================================================
  Files          1676       1683         +7     
  Lines        461990     466024      +4034     
================================================
+ Hits         338298     344684      +6386     
+ Misses       102926     100585      -2341     
+ Partials      20766      20755        -11     

Flag	Coverage Δ
integration	43.4766% <ø> (?)
unit	72.6814% <19.8412%> (+0.3188%)	⬆️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	46.0784% <ø> (+0.0845%)	⬆️

[winoros]

The general changes LGTM
But we may need to take care of the possible memory leak in our later tests.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-12-11 19:42:11.062535963 +0000 UTC m=+467521.151338498: ☑️ agreed by winoros.
• 2024-12-13 07:13:14.653415315 +0000 UTC m=+595384.742218029: ☑️ agreed by hawkingrei.

[hawkingrei]

/hold @elsa PTAL

[AilinKid]

/unhold

[AilinKid]

/retest

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[AilinKid]

/ok-to-test

[AilinKid]

/test unit-test

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[AilinKid]

/retest-required

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

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