feat / AEB-20 create csv parser

backend/sitemanagement/models.py

@@ -85,6 +85,8 @@ class Sensor(models.Model):
     name = models.CharField(max_length=50, blank=True, null=True)  # GA-1, HLE-1 и т.п.
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)
+    math_formula = models.CharField(null=True, blank=True, max_length=255)
+    
     class Meta:
         verbose_name = "Датчик"
         verbose_name_plural = "Датчики"