alarms: refactor the alarms subsystem

also include eotk alarms now

app/models/onions.py

@@ -1,3 +1,5 @@
+from flask import current_app
+
 from app.extensions import db
 from app.models import AbstractConfiguration, AbstractResource
 
@@ -17,3 +19,7 @@ class Eotk(AbstractResource):
     region = db.Column(db.String(20), nullable=False)
 
     group = db.relationship("Group", back_populates="eotks")
+
+    @property
+    def brn(self) -> str:
+        return f"brn:{current_app.config['GLOBAL_NAMESPACE']}:{self.group_id}:eotk:{self.provider}:instance/{self.region}"