Compensation model refactoring

* splits Intervention model into main components
   * Compensation (main object)
   * ResponsibilityData (holds organizations and handler) - same as used for intervention
   * This way data can be extended more easily in the future
* refactors deadlines

konova/models.py

@@ -12,6 +12,7 @@ from django.contrib.auth.models import User
 from django.contrib.gis.db.models import MultiPolygonField
 from django.db import models
 
+from konova.enums import DeadlineTypeEnum
 from konova.settings import DEFAULT_SRID
 
 
@@ -59,8 +60,9 @@ class Deadline(BaseResource):
     """
     Defines a deadline, which can be used to define dates with a semantic meaning
     """
-    type = models.CharField(max_length=500, null=True, blank=True)
+    type = models.CharField(max_length=255, null=True, blank=True, choices=DeadlineTypeEnum.as_choices(drop_empty_choice=True))
     date = models.DateField(null=True, blank=True)
+    comment = models.CharField(max_length=1000, null=True, blank=True)
 
     def __str__(self):
         return self.type