Use pre_execute signal to specify started vs queued

src-ui/src/app/data/paperless-task.ts

@@ -6,7 +6,8 @@ export enum PaperlessTaskType {
 }
 
 export enum PaperlessTaskStatus {
-  Incomplete = 'incomplete',
+  Queued = 'queued',
+  Started = 'started',
   Complete = 'complete',
   Failed = 'failed',
   Unknown = 'unknown',
@@ -25,5 +26,7 @@ export interface PaperlessTask extends ObjectWithId {
 
   created: Date
 
+  started?: Date
+
   result: string
 }