Azure Artifact Signing / Microsoft.CodeSigning backend failure creating PublicTrust certificate profile

I’m unable to create a PublicTrust certificate profile after completed Public identity validation.

Environment:

• Subscription type: Pay-As-You-Go
• Region: eastus
• SKU: Basic
• Microsoft.CodeSigning provider: Registered
• Artifact Signing account provisioningState: Succeeded
• Azure CLI: 2.87.0
• artifact-signing extension: 1.0.0
• API version shown in Activity Log: 2025-10-13
• Identity validation status: Completed
• Profile type: PublicTrust

Observed behavior:

The certificate profile PUT is accepted with HTTP 201 Created, then the async provisioning operation transitions to terminal Failed.

Activity Log:

• Operation: Microsoft.CodeSigning/codeSigningAccounts/certificateProfiles/write
• Error: ResourceOperationFailure
• Detail: The resource operation completed with terminal provisioning state 'Failed'
• Nested error: UnknownError
• Timestamp: 2026-06-16T20:02:58.0264410Z

Two failed profiles are now stuck

This appears to match other recent Artifact Signing backend provisioning failures where create/delete operations fail after ARM accepts the request.

Can the Microsoft.CodeSigning / Artifact Signing backend team investigate and clean up the failed certificateProfiles?