docs: outputs: forward: update retain_metadata_in_forward_mode default to true

[eschabell]

• flip the documented default parameter from false to true to match the upstream change in Fluent Bit commit 888db299e

Note this is a fix for code changes without corresponding docs PR

Summary by CodeRabbit

• Documentation
  • Updated configuration documentation to reflect the default value change for metadata retention in Forward mode.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e0b11985-3b6f-4774-8ca2-c31a0ed8b8a3

📥 Commits

Reviewing files that changed from the base of the PR and between bf3e17c and cc59b26.

📒 Files selected for processing (1)

• pipeline/outputs/forward.md

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📝 Walkthrough

Walkthrough

This PR updates the Forward output configuration documentation by changing the default value of retain_metadata_in_forward_mode from false to true in the configuration parameters table.

Changes

Forward Output Configuration Documentation

Layer / File(s)	Summary
Configuration Default Value Update pipeline/outputs/forward.md	The retain_metadata_in_forward_mode parameter default is changed from false to true in the configuration table.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested labels

5.0.3

Suggested reviewers

• patrick-stephens

Poem

🐰 A single line, so small yet true,
Metadata retention, the default anew,
From false to true, the config flows,
Documentation blooms as knowledge grows! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: updating the documented default value of retain_metadata_in_forward_mode from false to true in the forward output 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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