The verification section is the strongest part of this for me -- treating "document not found" as the only thing that establishes logical absence, rather than trusting the delete call's own success response. One thing worth adding for Azure AI Search specifically: deletes propagate to replicas asynchronously, so a verification read issued right after the delete request can still land on a replica that hasn't caught up yet and come back with the document still present. If the verification step runs immediately after the delete call in the same task execution, that's a false "still there" -- harmless if it just triggers a retry, but it could get misread as "deletion failed, escalate" when the delete actually succeeded. Feels like it wants the same settle/retry treatment you already give the delete itself, applied to the verification read too.