tiflash-proxy-next-gen: bind data key id from encryption meta

[JaySon-Huang]

This is an automated cherry-pick of #10948

What problem does this PR solve?

Issue Number: ref #10952

Problem Summary:

What is changed and how it works?

Bump submodule contrib/tiflash-proxy-next-gen to pick up next-gen proxy data key id binding from encryption meta.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  • Tested tiflash write can read data key generated by latest-release-tikv.
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[ti-chi-bot]

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
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[LGTM Timeline notifier]

Timeline:

• 2026-07-06 09:11:57.907528073 +0000 UTC m=+13703.943623159: ☑️ agreed by Lloyd-Pottiger.

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Lloyd-Pottiger, overvenus, yongman

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