[communication-short-codes] Recurring CI failures: Short Codes service returns HTTP 500 for manage Attachments

[deyaaeldeen]

Summary

The manage Attachments live tests in @azure-tools/communication-short-codes have been recurring failures across multiple CI runs. All 7 failures occur in live mode only.

Related to #37849

Error

The server encountered an internal error.

HTTP 500 from the Short Codes service when the test attempts to manage attachments on a program brief.

Root Cause

The Short Codes service is returning HTTP 500 internal server errors for the attachment management API. This is a service-side bug, not a resource provisioning or code issue. The live test environment may have stale or invalid attachment resources.

Affected Tests

• File: sdk/communication/communication-short-codes/test/public/manageProgramBriefAttachment.spec.ts
• Suite: ShortCodesClient - manage Attachments > can manage Attachments
• Stats: 7 failed / 134 passed / 142 total (multiple platform variants)

Notes

• No skip flag exists for this test (unlike communication-identity)
• The test has cleanup logic (runTestCleaningLeftovers) but it cannot recover from server 500s
• Test resources are provisioned via the shared sdk/communication/test-resources/test-resources.bicep — re-provisioning will not fix a service-side 500

/cc @besh2014 @gfeitosa-msft @ihuseynov-msft @ilyapaliakou-msft @kirill-linnik @phermanov-msft