Add comprehensive oracle failure test suite

[Junirezz]

Summary

Create a comprehensive test suite for oracle failure scenarios including heartbeat failures, deviation spikes, and network partitions.

Acceptance Criteria

• Write foundry/rye tests for oracle edge cases
• Test mock oracle with configurable failure modes
• Test real oracle integration with timeout scenarios
• Document failure handling procedures
• Ensure 90% test coverage for oracle modules

Related

• Related to: oracle validator and price validation libraries

[Gonness-Codes]

@Gonness-Codes has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I'd like to work on this issue. I've gone through the description and acceptance criteria and I'm confident I can deliver it. I'll make sure every acceptance criterion is met and submit a clean, tested PR. Please assign it to me.

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[Theraxia]

@Theraxia has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

hi maintainer, i would like to work on this issue, thanks

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Theraxia to this issue.

[amanosiadnan-cmyk]

@amanosiadnan-cmyk has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hii, I'd ike to work on this issue repo maintainer

ℹ️ Repo Maintainers: To accept this application, review their application or assign @amanosiadnan-cmyk to this issue.

[drips-wave]

Congratulations, @amanosiadnan-cmyk! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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[drips-wave]

This issue has been completed by @amanosiadnan-cmyk as part of the Stellar Wave Program's 8th Wave 🥳

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