Repository Services: complete the group entry and move the team under Armin

Why is this change being made?

Create:Source Code split into four teams on 2026-09-21 (execution plan). !143982 (merged) created the repository_services group in stages.yml and moved Jerry Seto, Joe Woodward and Fred Reinink onto it, but left the entry pointing at the old Repository Management sub-team and the engineers reporting to Daniel Lanthier. This MR finishes the entry for the Repository Services team (EM: Armin Pašalić) and is tracked in the team-setup issue https://gitlab.com/gitlab-org/create-stage/-/work_items/13314 (confidential).

data/stages.yml, group repository_services

• description: what the team owns and the one settled part of its mission (the access layer on Gitaly's primitives); the full mission statement is still being defined, and the description says so.
• handbook: engineering/devops/create/source-code/repository-services (page added in a companion handbook MR, linked from the tracking issue).
• slack.channel: g_create_repository-services (channel creation is tracked in the issue; g_create_repository-management was the sub-team-era name).
• categories: [] made explicit. source_code_management stays with Source Code Investigation until the Source Code category is split, as agreed in the setup issues.

Person files

• j.seto.yml, freinink.yml: a consistent , Create:Repository Services role suffix outside the job-family link (Jerry's said … Team, Fred's had the team inside the link). The reports_to: armin.pasalic change this MR originally carried landed on master through the Workday sync of 2026-10-02, as did Jerry's specialty fix, so the rebased MR no longer touches those lines; specialty stays owned by the sync.
• armin.pasalic.yml: Create:Repository Services Team added to team_tags; role string extended.

The handbook team page renders its member table from reports_to, so the reports_to change is what makes the new page list the team.

Validation (run locally on this branch)

• bundle exec rake lint:stages_yml lint:team_yml:team_tags lint:team_yml:types lint:team_yml:unique lint:team_yml:gitlab_names passes.
• bundle exec rspec spec/stages spec/homepage/group_spec.rb: 99 examples, 0 failures (re-run after rebasing onto master on 2026-10-05).
• yamllint --config-file .yamllint.yml on the five files passes.

Author and Reviewer Checklist

• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change
• Assign reviewers for this MR to the correct DRI (John Hope for the Create stage entry; team-member data per CODEOWNERS)
• For transparency, share this MR with the audience that will be impacted (#s_create)

🤖 Generated with Claude Code

Merge order

Depended on gitlab-com/content-sites/handbook!21272 (merged), merged 2026-09-28: the handbook: path in stages.yml now resolves and the Planner Intelligence team table is already scoped. Nothing blocks this MR.