Update: Metadata Extraction Table

coscine/issues#1788

src/Database/Models/MetadataExtractionModel.cs

+using Coscine.Database.DataModel;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Linq.Expressions;
+
+namespace Coscine.Database.Models
+{
+    public class MetadataExtractionModel : DatabaseModel<MetadataExtraction>
+    {
+        public override Expression<Func<MetadataExtraction, Guid>> GetIdFromObject()
+        {
+            return (metadataExtractionEntry) => metadataExtractionEntry.Id;
+        }
+
+        public override DbSet<MetadataExtraction> GetITableFromDatabase(CoscineDB db)
+        {
+            return db.MetadataExtractions;
+        }
+
+        public override void SetObjectId(MetadataExtraction databaseObject, Guid id)
+        {
+            databaseObject.Id = id;
+        }
+    }
+}