feat: add consent_photo to team export (#1031)

Author: jaksia

bullet/users/models/contestants.py

@@ -260,6 +260,7 @@ def to_export(self, str_only: bool = False):
             "solved_problems": self.solved_problem_count
             if hasattr(self, "solved_problem_count")
             else "",
+            "consent_photos": self.consent_photos,
         }