out_chronicle: Add descriptions for label and namespace mappings

[cosmo0920]

Corresponding PR is: fluent/fluent-bit#11836.

Summary by CodeRabbit

• Documentation
  • Expanded Google Chronicle output plugin documentation with new configuration parameters for enhanced label and namespace management.
  • Added practical examples demonstrating namespace fallback handling, record-based namespace resolution, and label configuration in both YAML and Fluent Bit formats.

[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: f544c32b-86b2-41f6-95a4-6803f39873e9

📥 Commits

Reviewing files that changed from the base of the PR and between d3d0a7a and 3a17b3b.

📒 Files selected for processing (1)

• pipeline/outputs/chronicle.md

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📝 Walkthrough

Walkthrough

Documentation for the Google Chronicle output plugin is expanded with new configuration parameters and practical usage examples. The configuration table now includes label, namespace, and namespace_key options, followed by a new section with YAML and Fluent Bit format examples showing namespace resolution and label attachment patterns.

Changes

Chronicle Output Configuration Documentation

Layer / File(s)	Summary
Configuration parameter reference table pipeline/outputs/chronicle.md	Configuration parameters table extended with new label (repeatable), namespace, and namespace_key entries to document Chronicle batching controls.
Namespace resolution and label usage examples pipeline/outputs/chronicle.md	Added documentation section with YAML and Fluent Bit config examples demonstrating fallback namespace configuration, namespace_key-based namespace resolution from records, and attachment of both static and record-derived labels to Chronicle output batches.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• fluent/fluent-bit-docs#2419: Both PRs modify pipeline/outputs/chronicle.md's configuration parameters table and related Chronicle examples, with direct content overlap in the same documentation file.

Suggested labels

5.0

Suggested reviewers

• eschabell
• patrick-stephens

Poem

🐰 A Chronicle of new ways to name,
Labels and namespaces stake their claim,
With examples bright in YAML's embrace,
Fluent Bit docs find their rightful place!
Configuration blooms, both static and free,
Documentation hops—as it ought to be! 🌿

🚥 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 concisely describes the main change: adding documentation for label and namespace mappings in the Chronicle output plugin.
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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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cosmo0920-chronicle-namespace-mapping

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[patrick-stephens]

We probably should always quote yaml strings because it can cause YAML specific formatting failures.