improvement: QRcode and shared link added to cases inorder to make it possible for staff users to share a case info with other staffs or other clinics.

backend/prisma/migrations/20260714153000_lab_case_access_token/migration.sql

@@ -0,0 +1,5 @@
+-- AlterTable
+ALTER TABLE "lab_cases" ADD COLUMN "accessToken" TEXT;
+
+-- CreateIndex
+CREATE UNIQUE INDEX "lab_cases_accessToken_key" ON "lab_cases"("accessToken");

backend/prisma/schema.prisma

@@ -217,6 +217,7 @@ model LabCase {
   sentAt                    DateTime?
   dueDate                   DateTime?
   isImportant               Boolean   @default(false)
+  accessToken               String?   @unique
 
   treatment       Treatment                @relation(fields: [treatmentId], references: [id], onDelete: Cascade)
   details         LabCaseDetail[]