🗃️ Add database schema

server/prisma/schema.prisma

@@ -7,7 +7,49 @@ datasource db {
   url      = env("DATABASE_URL")
 }
 
-model test {
-  key String @id
-  value String
-}
+model Timetable {
+  id         Int       @id @unique @default(autoincrement())
+  createdAt  DateTime  @default(now())
+  updatedAt  DateTime  @updatedAt
+  class      String
+  validFrom  DateTime  @default(now())
+  validUntil DateTime?
+  data       Json
+}
+
+model Substitution {
+  id             Int      @id @unique @default(autoincrement())
+  createdAt      DateTime @default(now())
+  updatedAt      DateTime @updatedAt
+  class          String[]
+  date           DateTime
+  type           String
+  lesson         Int
+  changedTeacher String?
+  changedRoom    String?
+  changedSubject String?
+  removed        Boolean  @default(false)
+
+  SubstitutionChange SubstitutionChange[]
+}
+
+model SubstitutionChange {
+  id             Int          @id @unique @default(autoincrement())
+  createdAt      DateTime     @default(now())
+  substitution   Substitution @relation(fields: [substitutionId], references: [id])
+  substitutionId Int
+  type           String
+  changes        Json?
+  parseEvent     ParseEvent   @relation(fields: [parseEventId], references: [id])
+  parseEventId   Int
+}
+
+model ParseEvent {
+  id           Int      @id @unique @default(autoincrement())
+  createdAt    DateTime @default(now())
+  logFile      String
+  originalData String
+  duration     Int
+
+  SubstitutionChange SubstitutionChange[]
+}