implemented a lot of features

app/models/group.ts

@@ -12,9 +12,18 @@ export default class Group extends BaseModel {
   @column()
   declare active: boolean
 
+  /** Every article up to here was fetched successfully (see FetchRangeService). */
   @column({ columnName: 'last_indexed_id' })
   declare lastIndexedId: bigint
 
+  /** Download bodies of obfuscated articles to identify them (bandwidth-heavy). */
+  @column({ columnName: 'fetch_bodies' })
+  declare fetchBodies: boolean
+
+  /** How far the scheduler has queued fetch jobs. */
+  @column({ columnName: 'last_queued_id' })
+  declare lastQueuedId: bigint
+
   @column.dateTime({ autoCreate: true })
   declare createdAt: DateTime