team/migration: A vote for joechenrh to be Migration reviewer

[GMHDBJD]

What changed

• Nominate joechenrh as a Migration Reviewer.
• Add joechenrh to the Migration reviewers list.
• Record the nomination rationale and contribution summary in a vote document.

Why

This supersedes #826. The previous nominator is not a Migration team member; this nomination is submitted by GMHDBJD, a current Migration committer.

Validation

• jq -e . teams/migration/membership.json
• git diff --check

[pingcap-cla-assistant]

All committers have signed the CLA.

[ti-chi-bot]

@D3Hunter: adding LGTM is restricted to approvers and reviewers in OWNERS files.

Details

In response to this:

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-08-14 07:19:23.261480551 +0000 UTC m=+3376549.297575617: ☑️ agreed by lance6716.

[kennytm]

LGTM but please sign the CLA.

Shall we close #826?

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: D3Hunter, kennytm, lance6716
Once this PR has been reviewed and has the lgtm label, please assign zhangyangyu for approval. For more information see the Code Review Process.
Please ensure that each of them provides their approval before proceeding.

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Details

Needs approval from an approver in each of these files:

• teams/migration/OWNERS [kennytm,lance6716]
• votes/OWNERS

Approvers can indicate their approval by writing /approve in a comment
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