update add feed initial balance on cycle and fix its feature

backend/apps/farms/models.py

@@ -70,6 +70,7 @@ class Cycle(models.Model):
     doc_in_weight = models.IntegerField()
     doc_in_count = models.IntegerField()
     feed_initial_balance = models.IntegerField(default=0)
+    feed_initial_balance_date = models.DateField(null=True, blank=True)
     status = models.CharField(
         max_length=30, choices=STATUS_CHOICES, default=STATUS_ACTIVE, db_index=True
     )