Feat: add update_tribe in service

backend/model/tribe.py

@@ -45,6 +45,9 @@ class Tribe:
             return self.name == other.name
         return False
 
+    def __hash__(self) -> int:
+        return hash(self.name)
+
     def to_dict(self) -> dict:
         return {"name": self.name, "level": self.level}