feature: document instance exporting

resolves #154

Disco.Models/Services/Documents/DocumentExportRecord.cs

@@ -0,0 +1,23 @@
+using Disco.Models.Exporting;
+using Disco.Models.Repository;
+using System.Collections.Generic;
+
+namespace Disco.Models.Services.Documents
+{
+    public class DocumentExportRecord : IExportRecord
+    {
+        public DocumentTemplate DocumentTemplate { get; set; }
+        public IAttachment Attachment { get; set; }
+        public IAttachmentTarget AttachmentTarget { get; set; }
+
+        public Device Device { get; set; }
+        
+        public Job Job { get; set; }
+        public string JobStatus { get; set; }
+        public string JobTypeDescription { get; set; }
+        public IEnumerable<string> JobSubTypeDescriptions { get; set; }
+
+        public User User { get; set; }
+        public Dictionary<string, string> UserCustomDetails { get; set; }
+    }
+}