perf: add bans.user_id index, Redis cache layer, rate-limit improvements, radio contest/giveaway columns, and tests

- Add DB index on bans.user_id to speed up per-request ban lookups (migration 0008)
- Replace in-process rate limiter with Redis-backed implementation with in-memory fallback
- Add Redis caching layer for site settings with TTL invalidation (migration 0009)
- Add rate limiting to resetPassword to prevent token brute-force attacks
- Update all rateLimit callers to await the now-async function
- Flesh out RadioContests and RadioGiveaways models with title, description, prize, date, and winner columns
- Update radio contest/giveaway pages to display new fields
- Add tests for rate limiter (4 tests) and password-reset actions (3 tests)
- Add REDIS_URL environment variable (optional, falls back to in-memory)

prisma/migrations/0008_add_bans_user_id_index.sql

@@ -0,0 +1,4 @@
+-- 0008_add_bans_user_id_index.sql
+-- Adds an index on bans.user_id to speed up ban lookups by user (used by
+-- the access guard on every page request for logged-in users).
+CREATE INDEX IF NOT EXISTS `bans_user_id_index` ON `bans` (`user_id`);

prisma/migrations/0009_radio_contests_giveaways_columns.sql

@@ -0,0 +1,29 @@
+-- 0009_radio_contests_giveaways_columns.sql
+-- Fills in the empty RadioContests and RadioGiveaways tables with meaningful
+-- columns. These tables were created in migration 0004 with only id/timestamps.
+
+ALTER TABLE `radio_contests`
+  ADD COLUMN `title` VARCHAR(255) NOT NULL AFTER `id`,
+  ADD COLUMN `description` TEXT NULL AFTER `title`,
+  ADD COLUMN `prize` VARCHAR(255) NULL AFTER `description`,
+  ADD COLUMN `start_date` TIMESTAMP(0) NULL AFTER `prize`,
+  ADD COLUMN `end_date` TIMESTAMP(0) NULL AFTER `start_date`,
+  ADD COLUMN `winner_id` BIGINT UNSIGNED NULL AFTER `end_date`,
+  ADD COLUMN `is_active` BOOLEAN NOT NULL DEFAULT true AFTER `winner_id`,
+  ADD COLUMN `created_by` BIGINT UNSIGNED NULL AFTER `is_active`,
+  MODIFY COLUMN `created_at` TIMESTAMP(0) NULL AFTER `created_by`,
+  MODIFY COLUMN `updated_at` TIMESTAMP(0) NULL AFTER `created_at`;
+
+ALTER TABLE `radio_giveaways`
+  ADD COLUMN `title` VARCHAR(255) NOT NULL AFTER `id`,
+  ADD COLUMN `description` TEXT NULL AFTER `title`,
+  ADD COLUMN `prize` VARCHAR(255) NULL AFTER `description`,
+  ADD COLUMN `prize_amount` INT NOT NULL DEFAULT 0 AFTER `prize`,
+  ADD COLUMN `prize_currency` VARCHAR(50) NULL AFTER `prize_amount`,
+  ADD COLUMN `start_date` TIMESTAMP(0) NULL AFTER `prize_currency`,
+  ADD COLUMN `end_date` TIMESTAMP(0) NULL AFTER `start_date`,
+  ADD COLUMN `winner_id` BIGINT UNSIGNED NULL AFTER `end_date`,
+  ADD COLUMN `is_active` BOOLEAN NOT NULL DEFAULT true AFTER `winner_id`,
+  ADD COLUMN `created_by` BIGINT UNSIGNED NULL AFTER `is_active`,
+  MODIFY COLUMN `created_at` TIMESTAMP(0) NULL AFTER `created_by`,
+  MODIFY COLUMN `updated_at` TIMESTAMP(0) NULL AFTER `created_at`;

prisma/schema.prisma

@@ -92,6 +92,7 @@ model Ban {
   type        bans_type @default(account)
   cfhTopic    Int       @default(-1) @map("cfh_topic")
 
+  @@index([userId])
   @@map("bans")
 }
 
@@ -2121,17 +2122,35 @@ model RadioHistory {
 }
 
 model RadioContests {
-  id        BigInt    @id @default(autoincrement()) @db.UnsignedBigInt
-  createdAt DateTime? @map("created_at") @db.Timestamp(0)
-  updatedAt DateTime? @map("updated_at") @db.Timestamp(0)
+  id          BigInt    @id @default(autoincrement()) @db.UnsignedBigInt
+  title       String    @db.VarChar(255)
+  description String?   @db.Text
+  prize       String?   @db.VarChar(255)
+  startDate   DateTime? @map("start_date") @db.Timestamp(0)
+  endDate     DateTime? @map("end_date") @db.Timestamp(0)
+  winnerId    BigInt?   @map("winner_id") @db.UnsignedBigInt
+  isActive    Boolean   @default(true) @map("is_active")
+  createdBy   BigInt?   @map("created_by") @db.UnsignedBigInt
+  createdAt   DateTime? @map("created_at") @db.Timestamp(0)
+  updatedAt   DateTime? @map("updated_at") @db.Timestamp(0)
 
   @@map("radio_contests")
 }
 
 model RadioGiveaways {
-  id        BigInt    @id @default(autoincrement()) @db.UnsignedBigInt
-  createdAt DateTime? @map("created_at") @db.Timestamp(0)
-  updatedAt DateTime? @map("updated_at") @db.Timestamp(0)
+  id          BigInt    @id @default(autoincrement()) @db.UnsignedBigInt
+  title       String    @db.VarChar(255)
+  description String?   @db.Text
+  prize       String?   @db.VarChar(255)
+  prizeAmount Int       @default(0) @map("prize_amount")
+  prizeCurrency String? @map("prize_currency") @db.VarChar(50)
+  startDate   DateTime? @map("start_date") @db.Timestamp(0)
+  endDate     DateTime? @map("end_date") @db.Timestamp(0)
+  winnerId    BigInt?   @map("winner_id") @db.UnsignedBigInt
+  isActive    Boolean   @default(true) @map("is_active")
+  createdBy   BigInt?   @map("created_by") @db.UnsignedBigInt
+  createdAt   DateTime? @map("created_at") @db.Timestamp(0)
+  updatedAt   DateTime? @map("updated_at") @db.Timestamp(0)
 
   @@map("radio_giveaways")
 }