fix: use parentTaskId for telemetry to support history-resumed subtasks

The telemetry properties were using task?.parentTask?.taskId and
!!task.parentTask, but when a subtask is resumed from history via
reopenParentFromDelegation, the live parentTask reference is undefined
(since the parent was disposed). The parentTaskId string is always
correctly set from the persisted historyItem.

Changed to use the persisted parentTaskId instead of the live reference.

Author: hannesrudolph

src/core/webview/ClineProvider.ts

@@ -2906,11 +2906,11 @@ export class ClineProvider
 			language,
 			mode,
 			taskId: task?.taskId,
-			parentTaskId: task?.parentTask?.taskId,
+			parentTaskId: task?.parentTaskId,
 			apiProvider: apiConfiguration?.apiProvider,
 			modelId: task?.api?.getModel().id,
 			diffStrategy: task?.diffStrategy?.getName(),
-			isSubtask: task ? !!task.parentTask : undefined,
+			isSubtask: task ? !!task.parentTaskId : undefined,
 			...(todos && { todos }),
 		}
 	}