Context
The test test_tally_public_cloud.py::test_validate_tally_on_public_cloud_with_sla[Premium-AWS] is failing and needs investigation and resolution.

See https://gitlab.cee.redhat.com/insights-qe/iqe-rhsm-subscriptions-plugin/-/jobs/45355754#L3239

Acceptance Criteria

• Investigate if this is truly a blocker or just a flaky test.
• Investigate why the test is failing
• Identify root cause of the failure
• Fix the test or the underlying implementation as appropriate
• Ensure all related tests continue to pass
• Update test documentation if needed