Try to fix pkey migration

packages/db/migrations/052_rename_pkey.ts

@@ -1,10 +1,14 @@
 import { type Kysely, sql } from 'kysely';
 
 export async function up(db: Kysely<unknown>): Promise<void> {
-  try {
+  const result = await sql<{ count: number }>`
+    SELECT COUNT(*) as count 
+    FROM pg_indexes 
+    WHERE indexname = 'nostr_events_new_pkey'
+  `.execute(db);
+
+  if (result.rows[0].count > 0) {
     await sql`ALTER INDEX nostr_events_new_pkey RENAME TO nostr_events_pkey;`.execute(db);
-  } catch {
-    // all good
   }
 }