(ticdc) add cdc engineering and architecture roadmap

[zhangjinpeng87]

What problem does this PR solve?

Issue Number: close #10497

What is changed and how it works?

Add an open roadmap from the engineering and architecture aspects, to express our intension on this open source project in next 1~2 years.

Check List

Tests

• No code

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

`None`.

[ti-chi-bot]

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[ti-chi-bot]

@zhangjinpeng87: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cdc-integration-storage-test	42d192f	link	true	/test cdc-integration-storage-test
pull-cdc-integration-pulsar-test	42d192f	link	true	/test cdc-integration-pulsar-test
jenkins-ticdc/verify	42d192f	link	true	/test verify
pull-cdc-integration-kafka-test	42d192f	link	true	/test cdc-integration-kafka-test

Full PR test history. Your PR dashboard.

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[asddongmen]

Suggested change

	- TiCDC can recover quickly under unexpected sinle node failure, partial network failure, and other temporary partial infra failtures.
	- TiCDC can quickly recover from unexpected single node failures, partial network failures, and other temporary partial infrastructure failures.

[asddongmen]

Suggested change

	- TiCDC HA capability assesment
	- TiCDC HA capability assessment

[asddongmen]

Throupt -> throughput

[asddongmen]

Suggested change

	- TiCDC fetch data change logs from the Unified Log Service to eliminate incremental scan issue and simplify network complexity on cloud enviornment
	- TiCDC fetches data change logs from the Unified Log Service to eliminate incremental scan issue and simplify network complexity on cloud environment.

[asddongmen]

This can also make the memory consumption of TiCDC server predictable.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.9444%. Comparing base (2b1ded2) to head (42d192f).
Report is 354 commits behind head on master.

Additional details and impacted files

Components	Coverage Δ
cdc	∅ <ø> (∅)
dm	51.2275% <ø> (+0.0081%)	⬆️
engine	63.4211% <ø> (+0.0070%)	⬆️

Flag	Coverage Δ
unit	53.9444% <ø> (-3.4539%)	⬇️

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

@@               Coverage Diff                @@
##             master     #10498        +/-   ##
================================================
- Coverage   57.3983%   53.9444%   -3.4539%     
================================================
  Files           849        403       -446     
  Lines        125866      63519     -62347     
================================================
- Hits          72245      34265     -37980     
+ Misses        48209      26556     -21653     
+ Partials       5412       2698      -2714