ticdc: remove awkward directly from Debezium doc

[yahonda]

What is changed, added or deleted? (Required)

ticdc/ticdc-debezium.md's classic-architecture description says "the Debezium protocol only supports Row Changed events and directly ignores DDL events and WATERMARK events." "directly ignores" is an overly literal rendering of the Chinese source's "直接忽略" (docs-cn#16513) - in English, "directly" reads as a spatial/routing adverb and doesn't collocate naturally with "ignores". Dropped it; the preceding "only supports Row Changed events" already makes the contrast to the ignored event types clear.

Which TiDB version(s) do your changes apply to? (Required)

• master (the latest development version)
• v8.5 (TiDB 8.5 versions)
• v8.4 (TiDB 8.4 versions)
• v8.3 (TiDB 8.3 versions)
• v8.2 (TiDB 8.2 versions)
• v8.1 (TiDB 8.1 versions)
• v7.5 (TiDB 7.5 versions)
• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)

What is the related PR or file link(s)?

• This PR is translated from:
• Other reference link(s): this "classic TiCDC architecture" tab/section does not exist on master (that doc has already moved past the classic/new architecture split), so master does not need this fix

AI agent involvement

• The changes in this PR were primarily made by an AI agent on behalf of the PR author.

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

Summary by CodeRabbit

• Documentation
  • Clarified the description of how classic TiCDC handles DDL and WATERMARK events.

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📥 Commits

Reviewing files that changed from the base of the PR and between ad7f1b4 and 540b421.

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• ticdc/ticdc-debezium.md

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📝 Walkthrough

Walkthrough

The TiCDC Debezium documentation now states that DDL and WATERMARK events are ignored without the former “directly” qualifier.

Changes

TiCDC Debezium documentation

Layer / File(s)	Summary
Clarify ignored event description ticdc/ticdc-debezium.md	The classic architecture description now states that DDL and WATERMARK events are ignored.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 540b4

This is a localized documentation wording correction with no actionable merge-blocking risk remaining after normal checks and review.

Possibly related PRs

• pingcap/docs#23524: Both PRs update the TiCDC Debezium documentation for DDL and WATERMARK events.

Suggested labels: area/ticdc

Suggested reviewers: lilin90

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description explains the wording change, affected file and version, related reference, AI involvement, and scope options.
Title check	✅ Passed	The title clearly and concisely identifies the removal of the awkward word from the Debezium documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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