changer gestion des team intra tryout

app/validators.py

@@ -605,6 +605,18 @@ class TryoutTeamMemberSchema(StripMixin):
     )
 
 
+class TryoutTeamMemberPositionSchema(StripMixin):
+    """Update a team member's in-game position (role)."""
+
+    position = fields.String(
+        load_default='',
+        validate=validate.Length(
+            max=50,
+            error=_l('Position must be 50 characters or less.'),
+        ),
+    )
+
+
 class NoteContentSchema(StripMixin):
     """Bounded text stored as a team or personal coaching note."""