Track watch activity for scenes. (#3055)

* track watchtime and view time
* add view count sorting, added continue position filter
* display metrics in file info
* add toggle for tracking activity
* save activity every 10 seconds
* reset resume when video is nearly complete
* start from beginning when playing scene in queue

Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

internal/api/changeset_translator.go

@@ -296,3 +296,11 @@ func (t changesetTranslator) optionalBool(value *bool, field string) models.Opti
 
 	return models.NewOptionalBoolPtr(value)
 }
+
+func (t changesetTranslator) optionalFloat64(value *float64, field string) models.OptionalFloat64 {
+	if !t.hasField(field) {
+		return models.OptionalFloat64{}
+	}
+
+	return models.NewOptionalFloat64Ptr(value)
+}