Diverse input plugin docs are missing the http_server.workers parameter

[eschabell]

docs: inputs: http, splunk, prometheus-remote-write, elasticsearch:

Added the missing http_server.workers parameter (default: 1) from the shared HTTP server integration. Also note that buffer_chunk_size, buffer_max_size, and http2 are compatibility aliases for their http_server.* canonical names.

Fixes #2486

Summary by CodeRabbit

• Documentation
  • Updated input plugin documentation (Elasticsearch, HTTP, Prometheus remote write, Splunk) to clarify compatibility aliases for existing HTTP configuration parameters.
  • Added new http_server.workers configuration parameter across HTTP-based inputs for controlling HTTP listener worker thread count (default: 1).

[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: 08be5c99-ad24-4f70-a817-fa5c085f6d9c

📥 Commits

Reviewing files that changed from the base of the PR and between 21b6f3c and 269d27d.

📒 Files selected for processing (4)

• pipeline/inputs/elasticsearch.md
• pipeline/inputs/http.md
• pipeline/inputs/prometheus-remote-write.md
• pipeline/inputs/splunk.md

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📝 Walkthrough

Walkthrough

This PR updates documentation for four HTTP input plugins (Elasticsearch, HTTP, Prometheus Remote Write, Splunk) to document the new http_server.workers parameter and clarify that existing buffer and HTTP settings are compatibility aliases for their http_server.* counterparts.

Changes

Cohort / File(s)	Summary
HTTP Input Plugin Documentation Updates pipeline/inputs/elasticsearch.md, pipeline/inputs/http.md, pipeline/inputs/prometheus-remote-write.md, pipeline/inputs/splunk.md	Added http_server.workers parameter documentation (HTTP listener worker thread count, default 1). Clarified that buffer_chunk_size, buffer_max_size, and http2 are compatibility aliases mapping to their http_server.* counterparts.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related PRs

• #2267: Modifies HTTP input documentation with overlapping configuration parameters (buffer_chunk_size, buffer_max_size, http2).
• #2246: Updates Elasticsearch input documentation for HTTP-related configuration parameters.
• #2347: Modifies Splunk input documentation with the same configuration parameters (http2, buffer_chunk_size, buffer_max_size).

Suggested reviewers

• cosmo0920
• patrick-stephens

Poem

🐰 Hop, hop, hooray! The docs now shine so bright,
With aliases mapped and workers in sight,
Four plugins now speak in a harmonious way,
HTTP servers listening brighter today! ✨

🚥 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 accurately summarizes the main change: documenting the missing http_server.workers parameter across diverse input plugin docs.
Linked Issues check	✅ Passed	All requirements from issue #2486 are met: http_server.workers parameter added to all four specified files with correct defaults, and compatibility alias relationships documented.
Out of Scope Changes check	✅ Passed	All changes are directly aligned with the linked issue requirements; no out-of-scope modifications are present.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

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• Create PR with unit tests

📝 Coding Plan

• Generate coding plan for human review comments

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[eschabell]

@patrick-stephens and @cosmo0920 ready for review!