Use CURRENT_TIMESTAMP as default value for timestampable entries.

Furthermore the database migration generation is now detects correctly if there were no changes to DB.

src/Entity/Parts/Footprint.php

@@ -85,7 +85,7 @@ class Footprint extends PartsContainingDBElement
 
     /**
      * @var string
-     * @ORM\Column(type="string", length=65536)
+     * @ORM\Column(type="text")
      */
     protected $filename;
 
@@ -96,7 +96,7 @@ class Footprint extends PartsContainingDBElement
 
     /**
      * @var string
-     * @ORM\Column(type="string", length=65536)
+     * @ORM\Column(type="text")
      */
     protected $filename_3d;
 

src/Entity/Parts/Part.php

@@ -148,14 +148,14 @@ class Part extends AttachmentContainingDBElement
 
     /**
      *  @ColumnSecurity(type="datetime")
-     *  @ORM\Column(type="datetimetz", name="datetime_added")
+     * @ORM\Column(type="datetime", name="datetime_added", options={"default"="CURRENT_TIMESTAMP"})
      */
     protected $addedDate;
 
     /**
      * @var \DateTime The date when this element was modified the last time.
-     * @ORM\Column(type="datetimetz", name="last_modified")
      * @ColumnSecurity(type="datetime")
+     * @ORM\Column(type="datetime", name="last_modified", options={"default"="CURRENT_TIMESTAMP"})
      */
     protected $lastModified;
 

src/Entity/Parts/PartLot.php

@@ -66,7 +66,7 @@ class PartLot extends DBElement
     /**
      * @var ?\DateTime Set a time until when the lot must be used.
      * Set to null, if the lot can be used indefinitley.
-     * @ORM\Column(type="datetimetz", name="expiration_date", nullable=true)
+     * @ORM\Column(type="datetime", name="expiration_date", nullable=true)
      */
     protected $expiration_date;