Add license load metric endpoint and UI indicator

[cwarnermm]

@claude - Let's update the Mattermost Product Documentation to reflect the admin's product experience from Mattermost server v10.10 onward in mattermost/mattermost#30700

The doc update introduces a new field called Load Metric that's visible within the About > Mattermost dialog. This field's value reflects server activity levels and is used by Mattermost support and technical teams as a reference point when assisting with deployments—particularly in cases where environments where Mattermost support packets or site statistics cannot be shared externally. The new field isn't a standalone indicator of system performance or health, but rather a contextual data point used alongside other environmental information to better understand server usage and troubleshoot issues.

[claude]

Claude finished @cwarnermm's task —— View job • claude/issue-8101-20250620_164143 • Create PR ➔

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Documentation Updated for Load Metric Field in About Dialog ✅

I've successfully updated the Mattermost Product Documentation to include the new Load Metric field for the "About > Mattermost" dialog available from v10.10+.

Completed Tasks:

• Read repository structure and CLAUDE.md for setup instructions
• Search for existing documentation about "About > Mattermost" dialog
• Create documentation for the Load Metric field
• Update relevant documentation files
• Commit changes to the branch
• Provide PR creation link

Changes Made:

1. Created New Documentation File: source/collaborate/view-system-information.rst

• Documents how users access the About dialog through their profile menu
• Explains information displayed in the About dialog (version, database schema, license, build info)
• Documents the new Load Metric field available from Mattermost server v10.10
• Explains that Load Metric reflects server activity levels for support troubleshooting
• Notes it's used when support packets/statistics can't be shared externally
• Clarifies it's contextual data, not a standalone performance indicator

2. Updated Messaging Collaboration Guide: source/guides/messaging-collaboration.rst

• Added new documentation to the table of contents
• Added descriptive bullet point explaining the system information functionality

Key Documentation Features:

• ✅ Follows established Mattermost documentation patterns
• 📱 Includes separate instructions for web/desktop and mobile platforms
• 📝 Uses proper RST formatting and badges
• 🔗 Integrates seamlessly with existing documentation structure
• 📊 Clearly explains the Load Metric field's purpose and usage

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