[Testing] Testing: Contract Integration Tests

[milah-247]

Description:
Test contract interactions.

• Run multi-contract and state consistency tests.
• Verify events, test upgrade flows, and run recovery tests.

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[Markodiba]

@Markodiba has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

I would like to apply

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[drips-wave]

Congratulations, @Markodiba! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

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