Fixed: Slow renaming and deleting episodes

Closes #5499

src/NzbDrone.Core/Datastore/TableMapping.cs

@@ -114,7 +114,7 @@ namespace NzbDrone.Core.Datastore
             Mapper.Entity<EpisodeFile>("EpisodeFiles").RegisterModel()
                   .HasOne(f => f.Series, f => f.SeriesId)
                   .LazyLoad(x => x.Episodes,
-                            (db, parent) => db.Query<Episode>(new SqlBuilder()).Where(c => c.EpisodeFileId == parent.Id).ToList(),
+                            (db, parent) => db.Query<Episode>(new SqlBuilder().Where<Episode>(c => c.EpisodeFileId == parent.Id)).ToList(),
                             t => t.Id > 0)
                   .Ignore(f => f.Path);