fix: use fixed point scale for tour scoring

1st=10, 2nd=8, 3rd=6, 4th=4, 5th=3, 6th=2, 7th=1, rest=0.
Ties get same points, next rank skips (1,1,3 pattern).

src/services/tour-service.js

@@ -39,7 +39,7 @@ async function calculateLeaderboard(tourId) {
     };
   }
 
-  const numPlayers = players.length;
+  const pointsByRank = [10, 8, 6, 4, 3, 2, 1];
 
   for (const course of courses) {
     const courseResults = resultsByCourse[course.tour_course_id] || [];
@@ -51,7 +51,7 @@ async function calculateLeaderboard(tourId) {
         rank = i + 1;
       }
 
-      const points = Math.max(numPlayers - rank + 1, 1);
+      const points = rank <= pointsByRank.length ? pointsByRank[rank - 1] : 0;
       const r = courseResults[i];
       const relativePar = r.total_strokes - course.par;