docs: outputs: aws plugins adding description of EUSC and China region endpoint handling

[eschabell]

The following plugins update the region configuration param description:

pipeline/outputs/cloudwatch.md
pipeline/outputs/firehose.md
pipeline/outputs/kinesis.md
pipeline/outputs/s3.md

Fixes #2499

Summary by CodeRabbit

• Documentation
  • Updated AWS output plugins documentation (CloudWatch, Firehose, Kinesis, S3) to clarify support for China regions (cn-north-1, cn-northwest-1) and AWS European Sovereign Cloud region (eusc-de-east-1).
  • Documented automatic endpoint suffix handling for these regions with no custom configuration required.

[coderabbitai]

📝 Walkthrough

Walkthrough

Documentation updates to four AWS output plugins expand region parameter descriptions to explicitly document support for China regions (cn-north-1, cn-northwest-1) and AWS European Sovereign Cloud (eusc-de-east-1), noting automatic endpoint suffix handling.

Changes

Cohort / File(s)	Summary
AWS Output Plugin Region Documentation pipeline/outputs/cloudwatch.md, pipeline/outputs/firehose.md, pipeline/outputs/kinesis.md, pipeline/outputs/s3.md	Expanded region parameter descriptions to explicitly document support for China regions (cn-north-1, cn-northwest-1) and European Sovereign Cloud region (eusc-de-east-1), clarifying that Fluent Bit automatically applies correct endpoint suffixes (.amazonaws.com.cn or .amazonaws.eu) without requiring custom endpoint configuration.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• PR #2317: Modifies the same output plugin documentation files (kinesis.md and firehose.md), specifically updating region/Region configuration descriptions for AWS regional cloud support.

Suggested reviewers

• patrick-stephens

Poem

🐰 A hop through the clouds, both near and far,
From cn-north to eusc, we've raised the bar!
No custom endpoints need apply,
Fluent Bit knows where to fly. 🌍
Docs now shine with regional grace,
Every cloud finds its proper place!

🚥 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: adding documentation about EUSC and China region endpoint handling to AWS output plugins.
Linked Issues check	✅ Passed	The PR updates documentation for four AWS output plugins to document EUSC and China region support with endpoint handling, fully addressing the coding requirements from issue #2499.
Out of Scope Changes check	✅ Passed	All changes are documentation updates to the region parameter descriptions in four AWS output plugins, directly related to the linked issue objectives with no out-of-scope modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[eschabell]

@coderabbitai review

[coderabbitai]

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[coderabbitai]

🧹 Nitpick comments (1)

pipeline/outputs/s3.md (1)

77-77: Prefer eusc-* wording to avoid under-documenting EUSC support.

Line 77 currently names only eusc-de-east-1. Since the behavior is pattern-based for EUSC regions, consider wording it as eusc-* (with eusc-de-east-1 as an example) to prevent the docs from implying single-region support.

Suggested wording

-| `region` | The AWS region of your S3 bucket. China regions (`cn-north-1`, `cn-northwest-1`) and the AWS European Sovereign Cloud region (`eusc-de-east-1`) are supported; Fluent Bit automatically uses the correct endpoint suffix (`.amazonaws.com.cn` or `.amazonaws.eu`) and no custom `endpoint` is required. | `us-east-1` |
+| `region` | The AWS region of your S3 bucket. China regions (`cn-north-1`, `cn-northwest-1`) and AWS European Sovereign Cloud regions (`eusc-*`, for example `eusc-de-east-1`) are supported; Fluent Bit automatically uses the correct endpoint suffix (`.amazonaws.com.cn` or `.amazonaws.eu`) and no custom `endpoint` is required. | `us-east-1` |

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@pipeline/outputs/s3.md` at line 77, Update the region wording in the S3
output docs: replace the single-region mention `eusc-de-east-1` with
pattern-style `eusc-*` and keep `eusc-de-east-1` as an example (e.g., "eusc-*
(for example, eusc-de-east-1)") so the `region` table entry and the text that
currently references `eusc-de-east-1` reflect EUSC-wide support; search for the
`region` table cell and the literal `eusc-de-east-1` in the s3.md content to
make the change.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@pipeline/outputs/s3.md`:
- Line 77: Update the region wording in the S3 output docs: replace the
single-region mention `eusc-de-east-1` with pattern-style `eusc-*` and keep
`eusc-de-east-1` as an example (e.g., "eusc-* (for example, eusc-de-east-1)") so
the `region` table entry and the text that currently references `eusc-de-east-1`
reflect EUSC-wide support; search for the `region` table cell and the literal
`eusc-de-east-1` in the s3.md content to make the change.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 9da96d6d-9028-45a0-b4bd-a0d3fa086125

📥 Commits

Reviewing files that changed from the base of the PR and between 3179471 and 000aea1.

📒 Files selected for processing (4)

• pipeline/outputs/cloudwatch.md
• pipeline/outputs/firehose.md
• pipeline/outputs/kinesis.md
• pipeline/outputs/s3.md

[eschabell]

@patrick-stephens ready for review!