fix: suppress referral scores warning in production

Only show "Referral scores not available in trust pallet" warning
in development mode to prevent console spam in production.

The warning occurs because api.query.trust.referralScores is not
yet implemented in the trust pallet, but getAllScores() calls it
every time user data is loaded.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

shared/lib/scores.ts

@@ -133,7 +133,7 @@ export async function getReferralScore(
 ): Promise<number> {
   try {
     if (!api?.query?.trust?.referralScores) {
-      console.warn('Referral scores not available in trust pallet');
+      if (import.meta.env.DEV) console.warn('Referral scores not available in trust pallet');
       return 0;
     }