i18n(ja): restore literal quoted status/enum values in DM docs

[yahonda]

What is changed, added or deleted? (Required)

Found while investigating a similar literal-value defect on PR #23635. In dm/dm-query-status.md and dm/dm-continuous-data-validation.md, several quoted literal status/enum values that DM's query-status/validation commands actually return (or that a user matches against verbatim) had been translated into Japanese and re-quoted with full-width corner brackets (「」) instead of being kept as the literal English string in double quotes (""), matching the EN source:

• dm/dm-query-status.md: "stage"/"subTaskStatus"/"sources"/"unresolvedDDLLockID" (JSON field names) and "Check"/"Dump"/"Load"/"Sync" (DM processing unit names) — mistranslated as 「stage」-style corner-bracketed Japanese; also "synced" (subtask status value) mistranslated as 「同期済み」.
• dm/dm-continuous-data-validation.md: "ignored", "resolved", and "expired" (validation error-row/data status values) mistranslated as 「無視」, 「解決済み」, 「期限切れ」.

All fixes verified against the English source on release-8.5, and use straight double quotes ("") matching EN, not Japanese corner brackets.

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

• i18n-ja-release-8.5 (TiDB Japanese documentation for TiDB 8.5 versions)

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

• This PR is translated from:
• Other reference link(s): related to i18n(ja): restore DM-master and DM-worker as literal English terms #23635

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
  • Updated Japanese documentation terminology to use consistent English quoted labels: “ignored,” “resolved,” and “expired.”
  • Added the TiCDC version 8.5.8 to the documented version information.

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📝 Walkthrough

Walkthrough

Updated Japanese DM validation terminology to quoted English status terms and added the TiCDC version 8.5.8 to the shared version metadata.

Changes

DM documentation terminology

Layer / File(s)	Summary
Status terminology normalization dm/dm-continuous-data-validation.md	The documentation now uses "ignored", "resolved", and "expired" for the related validation states.

Version metadata

Layer / File(s)	Summary
TiCDC version metadata variables.json	Added the "ticdc-version": "8.5.8" property.

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

Merge Risk: ⚪ Minimal · up to 9e1f4

This change standardizes quoted English DM status terms and adds TiCDC version 8.5.8 metadata. No current merge-readiness risk has been identified.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description covers the required change, affected version, reference PR, AI involvement, and change classifications. The optional first-time contributor section is not required for all contributors…
Title check	✅ Passed	The title clearly and concisely describes the primary change: restoring literal quoted status and enum values in the Japanese DM documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

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Timeline:

• 2026-09-10 03:09:14.97481315 +0000 UTC m=+1939990.145907302: ☑️ agreed by qiancai.