docs: in_prometheus_scrape: fix config params, add missing options

[eschabell]

• Add missing parameters: bearer_token, buffer_max_size, http_passwd, http_user
• Fix host default: none -> localhost
• Fix port default: none -> 9100
• Sort configuration table alphabetically
• Add TLS configuration section with link to transport security docs

Fixes #2336.

Summary by CodeRabbit

• Documentation

  • Expanded Prometheus configuration documentation with comprehensive authentication methods (bearer tokens, HTTP credentials), TLS configuration guidance, enhanced configuration parameters with updated defaults, buffer management settings, and detailed usage examples.

• Chores

  • Updated repository configuration.

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[coderabbitai]

📝 Walkthrough

Walkthrough

This PR updates the Prometheus scrape metrics input plugin documentation to include missing configuration parameters and correct default values, while also adding CLAUDE.md to the .gitignore file.

Changes

Cohort / File(s)	Summary
Configuration & Meta Files \.gitignore	Added CLAUDE.md to ignored files list
Documentation Updates pipeline/inputs/prometheus-scrape-metrics\.md	Expanded configuration documentation with authentication keys (bearer_token, http_user, http_passwd), buffer_max_size parameter, corrected defaults (host: localhost, port: 9100), added TLS configuration section and guidance, replaced compact table with descriptive configuration table, and added usage example with vault endpoint

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Suggested reviewers

• cosmo0920

Poem

🐰 A hop, a skip, and docs refined,
With configs now so well-aligned,
We've tidied CLAUDE away,
And Prometheus shines bright today,
With parameters and defaults in line!

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Out of Scope Changes check	⚠️ Warning	The addition of CLAUDE.md to .gitignore appears unrelated to the Prometheus scrape documentation updates and may be an incidental or out-of-scope change.	Remove the CLAUDE.md .gitignore entry unless it is essential to this PR, or clarify its relationship to the documentation updates in the PR description.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main changes: fixing configuration parameters and adding missing options for the Prometheus scrape input plugin documentation.
Linked Issues check	✅ Passed	The PR successfully addresses all coding objectives from issue #2336: adds missing parameters (bearer_token, buffer_max_size, http_passwd, http_user), fixes defaults (host to localhost, port to 9100), and adds TLS documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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