Make infrastructure/teams/gitlab-dedicated obsolete

Why is this change being made?

Content for GitLab Dedicated Group has been moved under infrastructure-platforms tree.

Now it is time to make the old structure obsolete.

Duo provided summary of changes:

What's Changed:

Redirects Added

• Added redirect rules to layouts/index.redirects:

  # GitLab Dedicated pages moved to infrastructure-platforms - remove 2026-10-09 /handbook/engineering/infrastructure/team/gitlab-dedicated/ /handbook/engineering/infrastructure-platforms/gitlab-dedicated/ 301 /handbook/engineering/infrastructure/team/gitlab-dedicated/* /handbook/engineering/infrastructure-platforms/gitlab-dedicated/:splat 301

• This ensures automatic HTTP 301 (permanent) redirects instead of manual "page moved" messages

CODEOWNERS Updates:

• Added new ownership paths for infrastructure-platforms/gitlab-dedicated/
• Kept old ownership paths for infrastructure/team/gitlab-dedicated/ (for backward compatibility)
• Added @mckgl as additional owner for us-public-sector-services.md

12 Files Being Made Obsolete: All files in the old location now contain simple redirect messages like:

"This page is obsolete and has moved [here] (link to new location)"

Files affected:

• _index.md, environment-automation.md, dedicated-migration-team.md
• ecosystem.md, migration-acceleration-team.md, slas.md
• switchboard.md, us-public-sector-services.md
• migration-team-process/_index.md
• architecture/_index.md, architecture/from-dedicated-to-cells-technical-analysis.md

Cross-References Updated:

• company/working-groups/disaster-recovery.md
• company/working-groups/gitlab-dedicated.md
• engineering/infrastructure/platforms/_index.md

Author and Reviewer Checklist

Please verify the check list and ensure to tick them off before the MR is merged.

• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change, per say why, not just what
  • Copy/paste the Slack conversation to document it for later, or upload screenshots. Verify that no confidential data is added, and the content is SAFE
• Assign reviewers for this MR to the correct
  • The when to get approval handbook section explains when DRI approval is required
  • The who can approve handbook section explains how to identify the DRI
  • If the MR does not require DRI approval, consider asking someone on your team, such as your manager.
  • The approver may merge the MR. If they approve but don't merge, you can merge.
• For transparency, share this MR with the audience that will be impacted.
  • Team: For changes that affect your direct team, share in your group Slack channel
  • Department: If the update affects your department, share the MR in your department Slack channel
  • Division: If the update affects your division, share the MR in your division Slack channel
  • Company: If the update affects all (or the majority of) GitLab team members, post an update in #whats-happening-at-gitlab linking to this MR
    • For high-priority company-wide announcements work with the internal communications team to post the update in #company-fyi and align on a plan to circulate in additional channels like the "While You Were Iterating" Newsletter

Commits

• Update 12 files

• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/environment-automation.md
• /content/handbook/engineering/infrastructure-platforms/gitlab-dedicated/environment-automation.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/_index.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/dedicated-migration-team.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/ecosystem.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/migration-acceleration-team.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/slas.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/switchboard.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/us-public-sector-services.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/migration-team-process/_index.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/architecture/_index.md
• /content/handbook/engineering/infrastructure/team/gitlab-dedicated/architecture/from-dedicated-to-cells-technical-analysis.md

• Added the backlog refinement blurb on index

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