docs: document log directory size retention

[Copilot]

What changed

Documented the new logging.max_log_dir_size option introduced by the telemetry logging retention feature. The option defaults to 0B; when configured, closed log files are removed before writes as needed while active files may exceed the limit.

[logging]
max_log_dir_size = "0B"

Scope

• Documentation versions: Nightly
• Languages: English, Chinese

Verification

• Confirmed documentation matches the GreptimeDB logging configuration behavior.
• Updated corresponding English and Chinese configuration pages.

Checklist

• I verified the content against the applicable GreptimeDB version.
• I updated the relevant documentation versions and languages, or explained why not.
• I checked changed links and anchors.
• I updated navigation when the document structure changed.

• Fixes Update docs for feat(telemetry): add log directory size retention #2812

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[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-09T06:21:04.585780Z	6d66373	Draft marked ready

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[Copilot]

🟢 Approval recommended

The documentation update is scoped, consistent across English/Chinese Nightly pages, and matches the described logging.max_log_dir_size behavior.

Pull request overview

Documents the new logging.max_log_dir_size configuration option (log directory size retention) in the Nightly configuration reference, keeping English and Chinese pages aligned.

Changes:

• Added max_log_dir_size = "0B" to the [logging] TOML example snippet.
• Added a description of max_log_dir_size, including behavior around deleting closed log files and the “soft limit” note for active files.

File summaries

File	Description
docs/user-guide/deployments-administration/configuration.md	Adds the new logging option to the English Nightly configuration example and option list.
i18n/zh/docusaurus-plugin-content-docs/current/user-guide/deployments-administration/configuration.md	Adds the same logging option and explanation to the Chinese Nightly configuration page.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 0
• Review effort level: Lite

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