test: add comprehensive tests for batch claim winnings

[greatest0fallt1me]

Description:

Write comprehensive test cases for batch claim winnings atomicity and validation.

Requirements and Context:

• Must achieve minimum 95% test coverage
• Should test all claims succeed in one batch
• Should test atomic revert when one claim invalid
• Should test no double claim
• Should test event emission
• Should test empty batch and max batch size if limited

Suggested Execution:

1. Fork the repo and create a branch

   git checkout -b test/batch-claim-winnings-tests

2. Implement changes

   • Write tests: src/test.rs (batch claim winnings tests)
   • Validate test coverage

3. Test and commit

   • Run tests with coverage; include test output

Example Commit Message:

test: add comprehensive tests for batch claim winnings

Guidelines:

• Minimum 95 percent test coverage
• Clear documentation
• Timeframe: 24 hours

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[Tola-byte]

@Tola-byte has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I would like to work on this.

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[drips-wave]

Congratulations, @Tola-byte! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on February 26, 2026.

🧑‍💻 @Tola-byte: 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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