Mutation - updateCampaignRecipientExecution

Executor-side mutation: record actual recipient lifecycle progress after tool results or deliberate non-intervention. Do not use this mutation to request approval; call the real side-effect tool and let the approval queue set awaiting_approval when it pauses. An operator may stop execution with status failed and outcome manually_stopped, omitting campaignId and executionThreadId. Access: current CRM access plus campaign ownership or execution ownership. The current run is cancelled before the stop is recorded; cancellation failures preserve the claim for retry.