feat(specials): add launch and end dates for scheduling

prisma/migrations/20251123020226_add_special_scheduling/migration.sql

@@ -0,0 +1,18 @@
+-- RedefineTables
+PRAGMA defer_foreign_keys=ON;
+PRAGMA foreign_keys=OFF;
+CREATE TABLE "new_Special" (
+    "id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "name" TEXT NOT NULL,
+    "maxAttempts" INTEGER NOT NULL DEFAULT 7,
+    "unlockSteps" TEXT NOT NULL,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "launchDate" DATETIME,
+    "endDate" DATETIME
+);
+INSERT INTO "new_Special" ("createdAt", "id", "maxAttempts", "name", "unlockSteps") SELECT "createdAt", "id", "maxAttempts", "name", "unlockSteps" FROM "Special";
+DROP TABLE "Special";
+ALTER TABLE "new_Special" RENAME TO "Special";
+CREATE UNIQUE INDEX "Special_name_key" ON "Special"("name");
+PRAGMA foreign_keys=ON;
+PRAGMA defer_foreign_keys=OFF;

prisma/schema.prisma

@@ -30,13 +30,15 @@ model Genre {
 }
 
 model Special {
-  id          Int      @id @default(autoincrement())
-  name        String   @unique
-  maxAttempts Int      @default(7)
-  unlockSteps String   // JSON array: "[2,4,7,11,16,30,60]"
-  createdAt   DateTime @default(now())
+  id          Int           @id @default(autoincrement())
+  name        String        @unique
+  maxAttempts Int           @default(7)
+  unlockSteps String // JSON string: e.g. "[2, 4, 7, 11, 16, 30]"
+  createdAt   DateTime      @default(now())
+  launchDate  DateTime?
+  endDate     DateTime?
   songs       SpecialSong[]
-  dailyPuzzles DailyPuzzle[]
+  puzzles     DailyPuzzle[]
 }
 
 model SpecialSong {