implemented data sources with prisma in go

backend-go/prisma/schema.prisma

@@ -0,0 +1,60 @@
+generator goClient {
+  provider = "go run github.com/steebchen/prisma-client-go"
+  output   = "../internal/infrastructure/data/db"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+// User Model
+model UserDbo {
+  id          String      @id @default(uuid())
+  name        String
+  email       String      @unique
+  password    String
+  projects    ProjectDbo[] // Beziehung zu Projekten
+  timeEntries TimeEntryDbo[] // Beziehung zu Zeiteinträgen
+  createdAt   DateTime    @default(now())
+  updatedAt   DateTime    @updatedAt
+}
+
+// Project Model
+model ProjectDbo {
+  id          String      @id @default(uuid())
+  name        String
+  description String?
+  clientId    String?
+  tasks       ProjectTaskDbo[] // Beziehung zu Aufgaben
+  timeEntries TimeEntryDbo[] // Beziehung zu Zeiteinträgen
+  user        UserDbo        @relation(fields: [userId], references: [id])
+  userId      String
+  createdAt   DateTime    @default(now())
+  updatedAt   DateTime    @updatedAt
+}
+
+// TimeEntry Model
+model TimeEntryDbo {
+  id          String   @id @default(uuid())
+  startTime   DateTime
+  endTime     DateTime?
+  description String?
+  user        UserDbo     @relation(fields: [userId], references: [id])
+  userId      String
+  project     ProjectDbo  @relation(fields: [projectId], references: [id])
+  projectId   String
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+}
+
+// Task Model (optional)
+model ProjectTaskDbo {
+  id          String   @id @default(uuid())
+  name        String
+  description String?
+  project     ProjectDbo  @relation(fields: [projectId], references: [id])
+  projectId   String
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+}