feat: add file storage service and update configurations

refactor: migrate to tsup for builds and update tsconfigs
fix: update error handling and validation in payment service
chore: update package scripts and dependencies
docs: update README and env examples

packages/database/prisma/schema.prisma

@@ -48,7 +48,7 @@ model TelegramUser {
   createdAt    DateTime @default(now())
   updatedAt    DateTime @updatedAt
 
-  payments Payment[]
+  payments     Payment[]
   subscription Subscription?
 }
 
@@ -56,7 +56,7 @@ model Payment {
   id             String        @id @default(cuid())
   telegramUserId String
   amount         Decimal       @db.Decimal(10, 2)
-  currency       String        
+  currency       String
   status         PaymentStatus @default(PENDING)
   provider       String
   providerId     String?
@@ -78,10 +78,10 @@ model Plan {
   code             String  @unique()
   name             String
   description      String?
-  durationDays         Int
+  durationDays     Int
   dailyGenerations Int
   price            Int
-  currency       String
+  currency         String
 
   subscriptions Subscription[]
 
@@ -89,20 +89,44 @@ model Plan {
 }
 
 model Subscription {
-  id        String   @id @default(uuid())
-  telegramUserId    String   @unique
-  planId    String
+  id             String @id @default(uuid())
+  telegramUserId String @unique
+  planId         String
 
-  startedAt       DateTime        @default(now())
-  expiresAt DateTime
-  canceledAt      DateTime?
+  startedAt  DateTime  @default(now())
+  expiresAt  DateTime
+  canceledAt DateTime?
 
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 
-  plan Plan @relation(fields: [planId], references: [id], onDelete: Cascade)
+  plan         Plan         @relation(fields: [planId], references: [id], onDelete: Cascade)
   telegramUser TelegramUser @relation(fields: [telegramUserId], references: [id], onDelete: Cascade)
 
   @@index([telegramUserId])
   @@index([planId])
 }
+
+model File {
+  id           String   @id @default(uuid())
+  filename     String
+  originalName String
+  mimeType     String
+  size         Int
+  path         String
+  createdAt    DateTime @default(now())
+  updatedAt    DateTime @updatedAt
+
+  links FileLink[]
+}
+
+model FileLink {
+  id         String @id @default(uuid())
+  fileId     String
+  relationId String
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  file File @relation(fields: [fileId], references: [id], onDelete: Cascade)
+}