improvement: new prosthesis type data structure implemented and finally working!

backend/prisma/schema.prisma

@@ -351,6 +351,16 @@ model ProsthesisType {
   sortOrder            Int     @default(0)
   isActive             Boolean @default(true)
   skipPackingShipping  Boolean @default(false)
+  /// Picker column: crown | indirect | implant | post_core | removable | appliance | digital
+  category             String  @default("crown")
+  /// Optional second drill (veneer/inlay/onlay/overlay, night_guard, …). Empty if none.
+  subcategory          String  @default("")
+  /// Chart tint: crown | root | arch
+  chartRegion          String  @default("crown")
+  /// Mutual exclusion group: restoration | implant | post_core | arch
+  stackGroup           String  @default("restoration")
+  /// Also listed as an add-on: implant | post_core | empty
+  addonKind            String  @default("")
 
   steps ProsthesisTypeStep[]
 
@@ -398,7 +408,7 @@ model LabCaseToothProsthesis {
   detail  TreatmentDetail? @relation(fields: [treatmentDetailId], references: [id], onDelete: Cascade)
   line    LabCaseLine?     @relation(fields: [lineId], references: [id], onDelete: Cascade)
 
-  @@unique([labCaseId, sourceKey, tooth])
+  @@unique([labCaseId, sourceKey, tooth, prosthesisTypeCode], map: "lab_case_tooth_prosthesis_case_source_tooth_type_key")
   @@map("lab_case_tooth_prosthesis")
 }
 
@@ -409,6 +419,8 @@ model LabCaseTask {
   lineId             String?
   /// treatmentDetailId (clinic) or lineId (lab-origin) — required unique grouping key.
   sourceKey          String
+  /// Single FDI tooth or arch sentinel (UA/LA). One task pipeline per tooth.
+  tooth              String        @default("")
   teeth              Json
   treatmentType      String
   prosthesisTypeCode String
@@ -433,7 +445,7 @@ model LabCaseTask {
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 
-  @@unique([labCaseId, sourceKey, prosthesisTypeCode, stepOrder], map: "lab_case_tasks_case_source_prosthesis_step_key")
+  @@unique([labCaseId, sourceKey, tooth, prosthesisTypeCode, stepOrder], map: "lab_case_tasks_case_source_tooth_prosthesis_step_key")
   @@index([labCaseId, status])
   @@index([assigneeUserId])
   @@map("lab_case_tasks")