[Contract] Unit Test: zero-price free ticket

[Yunusabdul38]

Description: Verify that the ticket payment and inventory system handles free tickets (0 price) correctly. The system should increment inventory without requiring token transfers. Tasks:

Create a test suite with a 0-price ticket tier.
Perform a purchase for the free tier.
Verify inventory increments and no zero-value transfers occur.

[Coredevjay]

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

i can work on this , can you assign this to me?

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[Johnsmichael150]

@Johnsmichael150 has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Hi maintainer, I would like to work on this issue

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

🧑‍💻 @Coredevjay: 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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This issue has been completed by @Coredevjay as part of the Stellar Wave Program's 3rd Wave 🥳

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