[AGNTLOG-229 Multiline features FAQ

[DDuongNguyen]

What does this PR do? What is the motivation?

This PR adds a user-friendly FAQ section to the multi-line log aggregation documentation to help users better understand when and how to use different multi-line aggregation approaches.

The motivation is to reduce confusion and help users choose the right multi-line aggregation approach for their specific needs.

Merge instructions

Merge readiness:

• [] Ready for merge

Additional notes

This is a documentation-only change that improves clarity without modifying any functionality.

[github-actions[bot]]

✅ Documentation Team Review

The documentation team has approved this pull request. Thank you for your contribution!

[github-actions[bot]]

Preview links (active after the build_preview check completes)

Modified Files

• https://docs-staging.datadoghq.com/yoon/multiline-faq/agent/logs/advanced_log_collection

[DDuongNguyen]

/merge

[dd-devflow-routing-codex[bot]]

View all feedbacks in Devflow UI.

2025-07-11 13:35:46 UTC :information_source: Start processing command /merge

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2025-07-11 13:35:56 UTC :information_source: MergeQueue: waiting for PR to be ready

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2025-07-11 14:16:31 UTC :information_source: MergeQueue: queue is disabled

Added to the queue but the mergequeue is not enabled for now.

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2025-07-21 18:00:42 UTC :information_source: MergeQueue: This merge request was already merged

This pull request was merged directly.