improvement: all demo bugs fixed. give me more baby.

backend/prisma/schema.prisma

@@ -195,6 +195,7 @@ model LabCase {
   sortOrder                 Int
   destinationOrganizationId String?
   sentAt                    DateTime?
+  isImportant               Boolean   @default(false)
 
   treatment       Treatment                @relation(fields: [treatmentId], references: [id], onDelete: Cascade)
   details         LabCaseDetail[]
@@ -333,7 +334,6 @@ model LabCaseTask {
   workflowStepCode   String
   stepOrder          Int
   stepLabel          String
-  isImportant        Boolean       @default(false)
   status             LabTaskStatus @default(IN_PROGRESS)
   lastStatusChangedByUserId String?
   lastStatusChangedAt       DateTime?
@@ -348,7 +348,6 @@ model LabCaseTask {
 
   @@unique([labCaseId, treatmentDetailId, prosthesisTypeCode, stepOrder])
   @@index([labCaseId, status])
-  @@index([labCaseId, isImportant])
   @@map("lab_case_tasks")
 }