fix ignoring date format

Author: guram-vashakidze

src/Eloquent/DocumentModel.php

@@ -106,7 +106,7 @@ public function getQualifiedKeyName()
      *
      * @param  mixed $value
      */
-    public function fromDateTime($value): UTCDateTime
+    public function fromDateTime($value): UTCDateTime|string
     {
         // If the value is already a UTCDateTime instance, we don't need to parse it.
         if ($value instanceof UTCDateTime) {
@@ -117,7 +117,9 @@ public function fromDateTime($value): UTCDateTime
         if (! $value instanceof DateTimeInterface) {
             $value = parent::asDateTime($value);
         }
-
+        if (isset($this->dateFormat)) {
+            return $value->format($this->getDateFormat());
+        }
         return new UTCDateTime($value);
     }
 
@@ -148,9 +150,6 @@ public function getDateFormat()
     /** @inheritdoc */
     public function freshTimestamp()
     {
-        if (isset($this->dateFormat)) {
-            return Date::now();
-        }
         return new UTCDateTime(Date::now());
     }