fix: order players alphabetically in attendance table

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app.py

@@ -95,7 +95,7 @@ def parse_date(date_str):
     return datetime.strptime(date_str, '%d/%m/%y')
 
 def db_to_json():
-    players = [p.name for p in Player.query.filter_by(active=True).order_by(Player.id)]
+    players = [p.name for p in Player.query.filter_by(active=True).order_by(Player.name)]
     guest = "Guest"
     dates = sorted([d.date_str for d in Date.query.all()], key=parse_date)
     attendance = {}