Implemented bulk upload by passing a json structure. Added delete all channels, groups and priorities

app/models/db.py

@@ -39,6 +39,8 @@ class SQLiteUUID(TypeDecorator):
     def process_result_value(self, value, dialect):
         if value is None:
             return value
+        if isinstance(value, uuid.UUID):
+            return value
         return uuid.UUID(value)
 
     def compare_values(self, x, y):