Changed library search via API to use search context.

backend/nestjs-seshat-api/src/library/library.consumer.ts

@@ -54,7 +54,7 @@ export class LibraryConsumer extends WorkerHost {
       const series: SeriesSubscriptionJobDto = job.data;
       const existingBooks = await this.library.findBooksFromSeries(series);
       const existingVolumes = existingBooks.map(b => b.volume);
-      const lastPublishedBook = existingBooks.sort((a, b) => b.publishedAt.getTime() - a.publishedAt.getTime())[0];
+      const lastPublishedBook = existingBooks.reduce((a, b) => a.publishedAt.getTime() > b.publishedAt.getTime() ? a : b);
       const books = await this.search(job, series, lastPublishedBook?.publishedAt);
 
       let counter = 0;