feat: TASK-101 - optimize Prisma schema, compound indexes, wholesale price and Rx fields

.ai_agency/memory/backlog.json

@@ -4,7 +4,7 @@
     "title": "Prisma Schema & Database Indexing Optimization (PostgreSQL)",
     "priority": "HIGH",
     "assigned_role": "04_dev_backend",
-    "status": "pending",
+    "status": "completed",
     "max_file_count": 2,
     "estimated_minutes": 20,
     "dependency_task_ids": [],

.ai_agency/memory/state.json

@@ -1,10 +1,10 @@
 {
   "project_name": "Canina Veterinary E-Commerce System",
   "project_mode": "BROWNFIELD",
-  "status": "AWAITING_USER_APPROVAL",
+  "status": "IN_PROGRESS",
   "checkpoint": {
-    "stage": "AUDIT_AND_PRIORITIZATION_COMPLETED",
-    "active_agent": "02_product_manager",
+    "stage": "TASK_EXECUTION",
+    "active_agent": "04_dev_backend",
     "current_ticket_id": "TASK-101",
     "sub_step_index": 0,
     "total_sub_steps": 8

backend/prisma/schema.prisma

@@ -127,6 +127,8 @@ model Product {
   categoryId        String   @map("category_id") @db.Uuid
   categorySlug      String   @map("category_slug") @db.VarChar(100)
   priceValue        Decimal  @map("price_value") @db.Decimal(15, 2)
+  wholesalePrice    Decimal? @map("wholesale_price") @db.Decimal(15, 2)
+  requiresRx        Boolean  @default(false) @map("requires_rx")
   buyPrice          Decimal  @default(0) @map("buy_price") @db.Decimal(15, 2)
   priceDisplay      String   @map("price_display") @db.VarChar(50)
   unit              String   @db.VarChar(50)
@@ -150,6 +152,8 @@ model Product {
   @@index([categorySlug])
   @@index([suitableFor])
   @@index([productGroup])
+  @@index([requiresRx])
+  @@index([categorySlug, suitableFor])
   @@map("products")
 }