обновление бизнес логики

backend/sitemanagement/models.py

@@ -40,7 +40,7 @@ class Channel(models.Model):
 
 class SensorType(models.Model):
     """Тип датчика: GA, PE, GLE"""
-    code = models.CharField(max_length=10, unique=True)  # GA, PE, GLE
+    code = models.CharField(max_length=255, unique=True)  # GA, PE, GLE
     name = models.CharField(max_length=100)
     description = models.TextField(blank=True, null=True)
     created_at = models.DateTimeField(auto_now_add=True)