Add Telegram bot login sessions

prisma/schema.prisma

@@ -35,11 +35,34 @@ model User {
   lastName       String?
   photoUrl       String?
   languageCode   String?
+  sessions       UserSession[]
+  loginRequests  TelegramLoginRequest[]
   voiceExperiences VoiceExperience[]
   createdAt      DateTime          @default(now())
   updatedAt      DateTime          @updatedAt
 }
 
+model UserSession {
+  id        String   @id @default(cuid())
+  tokenHash String   @unique
+  userId    String
+  user      User     @relation(fields: [userId], references: [id])
+  expiresAt DateTime
+  createdAt DateTime @default(now())
+}
+
+model TelegramLoginRequest {
+  id           String    @id @default(cuid())
+  tokenHash    String    @unique
+  status       String    @default("PENDING")
+  sessionToken String?
+  userId       String?
+  user         User?     @relation(fields: [userId], references: [id])
+  expiresAt    DateTime
+  createdAt    DateTime  @default(now())
+  updatedAt    DateTime  @updatedAt
+}
+
 model VoiceExperience {
   id              String                @id @default(cuid())
   placeId          String