feat: implement song rating system with admin view and user persistence

prisma/migrations/20251123083856_add_rating_system/migration.sql

@@ -0,0 +1,21 @@
+-- AlterTable
+ALTER TABLE "Special" ADD COLUMN "curator" TEXT;
+
+-- RedefineTables
+PRAGMA defer_foreign_keys=ON;
+PRAGMA foreign_keys=OFF;
+CREATE TABLE "new_Song" (
+    "id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "title" TEXT NOT NULL,
+    "artist" TEXT NOT NULL,
+    "filename" TEXT NOT NULL,
+    "coverImage" TEXT,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "averageRating" REAL NOT NULL DEFAULT 0,
+    "ratingCount" INTEGER NOT NULL DEFAULT 0
+);
+INSERT INTO "new_Song" ("artist", "coverImage", "createdAt", "filename", "id", "title") SELECT "artist", "coverImage", "createdAt", "filename", "id", "title" FROM "Song";
+DROP TABLE "Song";
+ALTER TABLE "new_Song" RENAME TO "Song";
+PRAGMA foreign_keys=ON;
+PRAGMA defer_foreign_keys=OFF;

prisma/schema.prisma

@@ -20,6 +20,8 @@ model Song {
   puzzles   DailyPuzzle[]
   genres    Genre[]
   specials  SpecialSong[]
+  averageRating Float    @default(0)
+  ratingCount   Int      @default(0)
 }
 
 model Genre {