Added indexes to Series table for searching. Removed byte[] from SearchResultDTO. Added response caching for all APIs. Responses are cached for 10 seconds.

API/DTOs/BookmarkDto.cs

@@ -0,0 +1,10 @@
+namespace API.Data
+{
+    public class BookmarkDto
+    {
+        public int VolumeId { get; init; }
+        public int ChapterId { get; init; }
+        public int PageNum { get; init; }
+        public int SeriesId { get; init; }
+    }
+}