Enforce code owner

[Tao Chen (TaoChenOSU)]

Motivation & Context

As the title suggests.

Description & Review Guide

• What are the major changes?
  • Enforce code owners
• What is the impact of these changes?
  • PRs now require code owners to review before they can be merged.
  • We will reduce the required approvers to 1 and enable require code owner setting.
• What do you want reviewers to focus on?
  • Code owner assignments

Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR is linked to an issue and there is no other open PR for this issue (see Related Issue above).
• This is not a breaking change. If it is a breaking change, add the breaking change label (or add "[BREAKING]" to the title prefix, before or after any language prefix) — a workflow keeps the label and title prefix in sync automatically.

[Copilot]

Pull request overview

Expands CODEOWNERS to enforce ownership across repository modules.

Changes:

• Defines repository, Python, and .NET owners.
• Documents approval and ownership policies.
• Reassigns sample ownership to language maintainers.

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[github-actions]

MAF Automated Review — Iteration 1

Result: Findings reported
Scope: full PR (2 commit(s)): aacf75adda2d, f8851d0557dd
Model: gpt-5.6-sol

Overview

The PR provides exhaustive explicit ownership for current Python and .NET packages, valid CODEOWNERS syntax, and redundant module owners. However, GitHub's native approval semantics do not implement the documented per-module requirement, the active Main ruleset still has code-owner review disabled, and the single-owner catch-all can block a future path authored by that owner.

Reviewed the supplied pull-request change set across correctness, security/reliability, architecture, and failure behavior.
3 verified findings remained after source verification (2 high, 1 medium) across 1 file. Details are attached to the affected lines below.

Affected areas: .github/CODEOWNERS

[github-actions]

MAF Automated Review — Iteration 2

Result: No findings
Scope: 1 net-new commit(s): ccd649946a77
Model: gpt-5.6-sol

Overview

This iteration corrects the documented multi-pattern approval semantics, adds a second catch-all owner, and fixes the official .NET capitalization. The added owner prevents the prior total-deadlock scenario, while the specialized ownership rules continue to provide broader reviewer redundancy; no new publishable issue remains after deduplication against the supplied prior findings.

Reviewed the supplied incremental change set across correctness, security/reliability, architecture, and failure behavior.
No publishable findings remained after source verification for this scope.