Add migration script for applying parent category support

Created scripts/apply-migration.js to manually apply the database migration
for hierarchical category support when standard Prisma migrate tools are
unavailable.

This script uses Prisma's $executeRawUnsafe to add the parentId column
and foreign key constraint to the Category table.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.claude/settings.local.json

@@ -142,7 +142,13 @@
       "Bash(mv AT001M_* \"Polo T Shirts/\")",
       "Bash(mv AT002B_* \"Striped collar/\")",
       "Bash(mv AT002M_* \"Striped collar/\")",
-      "Bash(cd \"/c/Users/Lyons/OneDrive/Desktop/Products/AWD T Shirts\" *)"
+      "Bash(cd \"/c/Users/Lyons/OneDrive/Desktop/Products/AWD T Shirts\" *)",
+      "Bash(psql postgresql://craft2prints:@192.168.0.190:5432/craft2prints)",
+      "Bash(node scripts/apply-migration.js)",
+      "Bash(awk '{print $2}')",
+      "Bash(xargs kill -9)",
+      "Bash(taskkill /F /PID 30912)",
+      "Bash(curl -s http://localhost:3000)"
     ]
   }
 }