Feat: add orm for Tribes

backend/model/tribe.py

@@ -20,3 +20,8 @@ class Tribe:
 
     def register_student(self, student: Student) -> None:
         self.students.append(student)
+
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, Tribe):
+            return self.name == other.name and self.level == other.level
+        return False