Testnet: Finalize and audit all multi-sig threshold configurations

[EDOHWARES]

Verify that all EmergencyGuard admin rotations and multi-sig thresholds are correctly set for testnet.

[raymondidahor-bot]

@raymondidahor-bot has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would love to work on this project and I promise to deliver within a short time

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Congratulations, @raymondidahor-bot! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @raymondidahor-bot: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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