chore: add config, prisma schema and client (Prisma 7 adapter)

prisma/schema.prisma

@@ -0,0 +1,49 @@
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "mysql"
+}
+
+model Download {
+  id          String    @id @default(cuid())
+  uuid        String    @unique @default(uuid())
+  url         String    @db.Text
+  status      Status    @default(PENDING)
+  format      String
+  quality     String
+  subtitles   Boolean   @default(false)
+  extraArgs   String?   @db.Text
+
+  filePath    String?   @db.Text
+  fileName    String?
+  fileSize    BigInt?
+  errorMsg    String?   @db.Text
+
+  ipAddress   String
+  submittedAt DateTime  @default(now())
+  startedAt   DateTime?
+  completedAt DateTime?
+  deletedAt   DateTime?
+
+  tokens      DownloadToken[]
+}
+
+model DownloadToken {
+  id         String    @id @default(cuid())
+  download   Download  @relation(fields: [downloadId], references: [id])
+  downloadId String
+  token      String    @unique @default(uuid())
+  expiresAt  DateTime
+  usedAt     DateTime?
+  createdAt  DateTime  @default(now())
+}
+
+enum Status {
+  PENDING
+  PROCESSING
+  DONE
+  FAILED
+  FILE_DELETED
+}