fix: scope team page scorers by teamId instead of filtering global top 200

Teams with few goals (e.g. Qatar) were missing from the sidebar because
topScorers(limit:200) only returned all-time top scorers. Now the query
filters by teamId in SQL so every team shows their own scorers.

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

lib/graphql/schema.ts

@@ -170,7 +170,7 @@ export const typeDefs = /* GraphQL */ `
     teams: [Team!]!
     team(slug: String!): Team
 
-    topScorers(year: Int, limit: Int): [ScorerEntry!]!
+    topScorers(year: Int, limit: Int, teamId: Int): [ScorerEntry!]!
     player(name: String!): ScorerEntry
     hatTricks(year: Int): [HatTrick!]!