chore(main): release 5.1.0

[github-actions]

🤖 I have created a release beep boop

5.1.0 (2025-10-16)

Features

• mention keep alive in migration guide (#594) (5a8c79e)
• update the SDK with upstream spec changes (d77ad96)

Bug Fixes

• ci: reference the correct secret (#585) (09550c7)
• corrects order to the release workflow (#583) (3abbac3)
• remove testpypi we don't need it in the workflow (#582) (b2e2538)
• support multiple keyterms for v2 listen client (#595) (7a9d41d)

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[github-actions]

🤖 Created releases:

• v5.1.0

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