DB => Add correctionDescription field

ExpressAPI/prisma/migrations/20240521164109_add_correction_description/migration.sql

+-- AlterTable
+ALTER TABLE `Exercise` ADD COLUMN `correctionDescription` VARCHAR(80) NULL;

ExpressAPI/prisma/schema.prisma

@@ -50,7 +50,8 @@ model Exercise {
     gitlabLastInfo     Json     @db.Json
     gitlabLastInfoDate DateTime
 
-    correctionCommit Json? @db.Json
+    correctionCommit      Json?   @db.Json
+    correctionDescription String? @db.VarChar(80)
 
     assignment Assignment @relation(fields: [assignmentName], references: [name], onDelete: NoAction, onUpdate: Cascade)