Fix http request logger help text

[anshikaagr]

Description

Added help text for the HTTP Request Logger plugin target field.

Changes include:

• Added user-facing help text explaining the expected target URL input and plugin behavior.
• Refreshed the plugin checksum after updating metadata.

Related Issues

Closes #525

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

How Has This Been Tested?

• Updated the plugin metadata with descriptive help text.
• Refreshed the checksum using:

py scripts/refresh_plugin_checksum.py --plugin http_request_logger

• Verified the metadata diff contains only the help text addition and checksum update.

Checklist

• My code follows the code style of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.

[utksh1]

This needs cleanup before merge. The PR bundles testing/backend/unit/test_request_middleware.py, which is already covered by #669, and the current backend-tests job is failing. Please rebase on latest main, remove the duplicate request middleware test file from this PR, and keep the diff focused on the http_request_logger metadata help text/checksum update.

[anshikaagr]

Thanks for the review. I've removed the unrelated test_request_middleware.py file from this branch and kept the PR focused on the http_request_logger metadata help text and checksum update. CI has been rerun.

[utksh1]

Approved after maintainer cleanup. The PR is now focused on plugin field help text and the affected plugin checksum validates locally.