feat: prisma schema and voucher status

prisma/schema.prisma

@@ -0,0 +1,57 @@
+datasource db {
+  provider = "sqlite"
+  url = env("DATABASE_URL")
+}
+generator client {
+  provider = "prisma-client-js"
+}
+model Voucher {
+  id Int @id @default(autoincrement())
+  name String
+  anbieter String
+  wertCents Int
+  restCents Int
+  ablaufdatum DateTime?
+  codeText String?
+  kategorie String?
+  notiz String?
+  status String @default("aktiv")
+  contacts VoucherContact[]
+  rules ReminderRule[]
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+}
+model Contact {
+  id Int @id @default(autoincrement())
+  name String
+  email String?
+  telegramChatId String?
+  vouchers VoucherContact[]
+}
+model VoucherContact {
+  voucherId Int
+  contactId Int
+  voucher Voucher @relation(fields: [voucherId], references: [id], onDelete: Cascade)
+  contact Contact @relation(fields: [contactId], references: [id], onDelete: Cascade)
+  @@id([voucherId, contactId])
+}
+model ReminderRule {
+  id Int @id @default(autoincrement())
+  voucherId Int
+  tageVorher Int
+  voucher Voucher @relation(fields: [voucherId], references: [id], onDelete: Cascade)
+  logs NotificationLog[]
+  @@unique([voucherId, tageVorher])
+}
+model NotificationLog {
+  id Int @id @default(autoincrement())
+  ruleId Int
+  kanal String
+  empfaenger String
+  zielDatum String
+  status String
+  fehler String?
+  sentAt DateTime @default(now())
+  rule ReminderRule @relation(fields: [ruleId], references: [id], onDelete: Cascade)
+  @@unique([ruleId, kanal, empfaenger, zielDatum])
+}