feat(portfolio): add grouping visibility and ordering controls

packages/db/prisma/migrations/20260213003000_tag_group_controls/migration.sql

@@ -0,0 +1,4 @@
+ALTER TABLE "Tag"
+ADD COLUMN "description" TEXT,
+ADD COLUMN "sortOrder" INTEGER NOT NULL DEFAULT 0,
+ADD COLUMN "isVisible" BOOLEAN NOT NULL DEFAULT true;

packages/db/prisma/schema.prisma

@@ -222,6 +222,9 @@ model Tag {
   id           String       @id @default(uuid())
   name         String
   slug         String       @unique
+  description  String?
+  sortOrder    Int          @default(0)
+  isVisible    Boolean      @default(true)
   createdAt    DateTime     @default(now())
   updatedAt    DateTime     @updatedAt
   artworkLinks ArtworkTag[]