Model refactor, part 2 (#4092)

* Move conversions into changesetTranslator
* Improve mutation error messages
* Use models.New and models.NewPartial everywhere
* Replace getStashIDsFor functions
* Remove ImageCreateInput
* Remove unused parameters
* Refactor matching functions
---------
Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

pkg/models/model_scene_marker.go

@@ -14,6 +14,14 @@ type SceneMarker struct {
 	UpdatedAt    time.Time `json:"updated_at"`
 }
 
+func NewSceneMarker() SceneMarker {
+	currentTime := time.Now()
+	return SceneMarker{
+		CreatedAt: currentTime,
+		UpdatedAt: currentTime,
+	}
+}
+
 // SceneMarkerPartial represents part of a SceneMarker object.
 // It is used to update the database entry.
 type SceneMarkerPartial struct {
@@ -26,8 +34,8 @@ type SceneMarkerPartial struct {
 }
 
 func NewSceneMarkerPartial() SceneMarkerPartial {
-	updatedTime := time.Now()
+	currentTime := time.Now()
 	return SceneMarkerPartial{
-		UpdatedAt: NewOptionalTime(updatedTime),
+		UpdatedAt: NewOptionalTime(currentTime),
 	}
 }