Clarify "Maximum artifacts archive size (bytes)" label and documentation
## Problem
The label "**Maximum artifacts archive size (bytes)**" in Admin > Settings > CI/CD > Continuous Integration and Deployment is unclear and doesn't accurately describe what the setting does. Additionally, the related documentation lacks information about accessing and configuring this setting through the admin interface.
## Current Behavior
- The UI label is "Maximum artifacts archive size (bytes)"
- The setting name is `max_artifacts_content_include_size`
- Users may confuse this with "Maximum artifacts size (MB)" which controls job artifact uploads
- The documentation only shows how to change the setting via Rails console, not through the admin UI
## What It Actually Does
This setting controls the **maximum size of artifact files when they're extracted and read** for inclusion in CI/CD configurations (specifically for dynamic child pipelines). It does NOT control the size of the artifact archive itself during upload.
## Issues to Address
### 1. UI Label Clarity
The label should be more descriptive, such as:
- "Maximum artifact file size for pipeline includes (bytes)"
- "Maximum artifact content size for dynamic child pipelines (bytes)"
- Or add help text explaining the actual functionality
### 2. Documentation Gap
The documentation at https://docs.gitlab.com/administration/instance_limits/#maximum-size-of-the-ci-artifacts-archive currently only shows:
``ApplicationSetting.update(max_artifacts_content_include_size: 20.megabytes)``
## Screenshots or screen recordings
{width=900 height=600}
## How to access the setting in the admin UI
Visit Admin > Settings > CI/CD > Expand Continuous Integration and Deployment
## Related
- MR: !166496 (introduced this UI setting)
- MR: !148554 (introduced the underlying feature)
- Issue: #455191
- Documentation: https://docs.gitlab.com/administration/instance_limits/#maximum-size-of-the-ci-artifacts-archive
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