[GH-02] Establish team-based CODEOWNERS and protected review rules

[jaavid]

Background

CoreLink is managed as one product across multiple implementation boundaries. This work is owned by .github under EPIC-01.

Problem

The organization does not yet have verified, consistently maintained evidence for this outcome: Establish team-based CODEOWNERS and protected review rules.

Goal

Establish team-based CODEOWNERS and protected review rules and make the result the authoritative, reviewable baseline for all affected repositories.

Parent

• Primary Product Epic: EPIC-01
• Backlog ID: GH-02

Scope

• Deliver the stated outcome in .github.
• Reconcile affected organization policy, product claims, ownership, security, release, documentation and repository maturity.
• Retain acceptance evidence for the Governance Baseline gate.

Out of Scope

• Runtime feature implementation in this Issue.
• Duplicating the product roadmap in repository README files.
• Presenting scaffolds or planned capability as a supported release.

Acceptance Criteria

• The outcome is documented or configured in its authoritative location.
• Affected repositories link to the source of truth instead of copying it.
• Ownership, review and exception paths are explicit.
• Security, license, privacy and release impacts are addressed where applicable.
• The result is validated against at least one real repository workflow.
• Acceptance evidence is linked and the parent Epic is updated.

Technical Notes

Use organization-wide defaults where inheritance is reliable. Repository-specific exceptions must be minimal and documented. Product maturity claims must distinguish Scaffold, Experimental, Alpha, Beta, Stable and Deprecated.

Dependencies

• Blocked by: Team and repository ownership approval
• Blocks: Resolved during refinement.
• Cross-repository: Link concrete affected Issues; do not duplicate implementation.

Planning Metadata

• Type: Technical Task
• Priority: P0
• Product milestone: Governance Baseline
• Domains: governance, security
• Area: operations
• Complexity: M
• Initial status: Triage
• DRI: Unassigned
• Intended labels: type:technical-task, priority:p0, domain:governance, domain:security, area:operations

Definition of Done

• Acceptance criteria demonstrated.
• Required reviews and retained evidence pass.
• Organization and repository links are updated.
• Security and policy implications are reviewed.
• Documentation and release notes are updated where applicable.
• Pull request or configuration change is linked.