Add reconcile_audit_summary tests for saturated total_revenue and override delta drift

[thlpkee20-wq]

Description

reconcile_audit_summary returns is_consistent and is_saturated, and the override path in report_revenue uses saturating_add(amount.saturating_sub(existing_amount)) to maintain total_revenue. There is no test confirming reconciliation flags drift after a sequence of overrides, nor that is_saturated is set when totals saturate. Add coverage tying overrides to reconciliation output.

Requirements and context

• Must be secure, tested, and documented
• Should be efficient and easy to review
• Relevant code: src/lib.rs (reconcile_audit_summary, report_revenue override branch, repair_audit_summary), src/audit_summary_tests.rs
• Confirm report_count is not incremented on override

Suggested execution

• Fork the repo and create a branch
• git checkout -b feat/audit-reconciliation-tests
• Implement changes
  • Report multiple periods, override several, call reconcile_audit_summary
  • Assert is_consistent true when cache matches and false after a forced drift
  • Drive total_revenue toward i128::MAX and assert is_saturated
• Validate security and correctness assumptions

Test and commit

• Run tests
  • cargo test
• Cover edge cases
  • Override increasing and decreasing amount, zero net delta, saturation
• Include test output and security notes

Example commit message

test: cover audit reconciliation drift and saturation

Guidelines

• Minimum 95 percent test coverage
• Clear documentation
• Timeframe: 96 hours

[Ayinkx1]

@Ayinkx1 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Pls can this be assigned to me?

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[drips-wave]

Congratulations, @Ayinkx1! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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