feat: employee history

prisma/schema.prisma

@@ -472,6 +472,20 @@ model Employee {
   employeeCheckup   EmployeeCheckup[]
   employeeWork      EmployeeWork[]
   employeeOtherInfo EmployeeOtherInfo[]
+
+  editHistory EmployeeHistory[]
+}
+
+model EmployeeHistory {
+  id          String @id @default(uuid())
+  field       String
+  valueBefore Json
+  valueAfter  Json
+
+  timestamp DateTime @default(now())
+
+  masterId String
+  master   Employee @relation(fields: [masterId], references: [id], onDelete: Cascade)
 }
 
 model EmployeeCheckup {