feat(api): add upvote/downvote and best-entry endpoints to performance entries

lib/db/schema/performanceEntries.ts

@@ -1,5 +1,6 @@
 import {
   boolean,
+  integer,
   jsonb,
   pgEnum,
   pgTable,
@@ -68,6 +69,10 @@ export const performanceEntries = pgTable(
     isRemoved: boolean("is_removed").default(false).notNull(),
     removedReason: text("removed_reason"),
 
+    // Community rating
+    upvotes: integer("upvotes").default(0).notNull(),
+    downvotes: integer("downvotes").default(0).notNull(),
+
     // Verification (admin/mod workflow)
     verifiedAt: timestamp("verified_at"),
     verifiedBy: text("verified_by").references(() => user.id, {