alarms: refactor the alarms subsystem

also include eotk alarms now

app/models/__init__.py

@@ -1,7 +1,10 @@
+from abc import abstractmethod
 from datetime import datetime
 from typing import Union, List, Optional, Any
 
+from app.alarms import alarms_for
 from app.extensions import db
+from app.models.alarms import Alarm
 
 
 class AbstractConfiguration(db.Model):  # type: ignore
@@ -13,6 +16,15 @@ class AbstractConfiguration(db.Model):  # type: ignore
     updated = db.Column(db.DateTime(), default=datetime.utcnow, nullable=False)
     destroyed = db.Column(db.DateTime(), nullable=True)
 
+    @property
+    def alarms(self) -> List[Alarm]:
+        return alarms_for(self.brn)
+
+    @property
+    @abstractmethod
+    def brn(self) -> str:
+        raise NotImplementedError()
+
     def destroy(self) -> None:
         self.destroyed = datetime.utcnow()
         self.updated = datetime.utcnow()
@@ -59,6 +71,11 @@ class AbstractResource(db.Model):  # type: ignore
         if self.updated is None:
             self.updated = datetime.utcnow()
 
+    @property
+    @abstractmethod
+    def brn(self) -> str:
+        raise NotImplementedError()
+
     def deprecate(self, *, reason: str) -> None:
         self.deprecated = datetime.utcnow()
         self.deprecation_reason = reason