feat(19-01): update Zod schemas, types, and seed script for reference model

- Add globalItemId and purchasePriceCents to createItemSchema
- Add globalItemId to createCandidateSchema
- Add tags param to searchGlobalItemsSchema
- Remove linkItemSchema from schemas and types
- Replace ItemGlobalLink with Tag and GlobalItemTag types
- Convert seedGlobalItems to async, add seedTags with 30 curated tags

src/db/seed-global-items.ts

@@ -1,27 +1,73 @@
 import seedData from "./global-items-seed.json";
 import { db as prodDb } from "./index.ts";
-import { globalItems } from "./schema.ts";
+import { globalItems, tags } from "./schema.ts";
 
 type Db = typeof prodDb;
 
+const SEED_TAGS = [
+	"handlebar-bag",
+	"framebag",
+	"saddlebag",
+	"top-tube-bag",
+	"stem-bag",
+	"fork-bag",
+	"hip-pack",
+	"backpack",
+	"tent",
+	"bivy",
+	"tarp",
+	"hammock",
+	"sleeping-bag",
+	"sleeping-pad",
+	"quilt",
+	"pillow",
+	"stove",
+	"cookware",
+	"water-filter",
+	"water-bottle",
+	"headlamp",
+	"bike-light",
+	"ultralight",
+	"waterproof",
+	"budget",
+	"premium",
+	"bikepacking",
+	"hiking",
+	"camping",
+	"touring",
+];
+
+/**
+ * Seed curated tags for outdoor/adventure gear.
+ * Idempotent: skips if any tags already exist.
+ */
+export async function seedTags(db: Db = prodDb) {
+	const existing = await db.select().from(tags).limit(1);
+	if (existing.length > 0) return;
+
+	for (const name of SEED_TAGS) {
+		await db.insert(tags).values({ name });
+	}
+}
+
 /**
  * Seed the global items table with initial bikepacking gear data.
  * Idempotent: skips if any rows already exist.
  */
-export function seedGlobalItems(db: Db = prodDb) {
-	const existing = db.select().from(globalItems).limit(1).all();
+export async function seedGlobalItems(db: Db = prodDb) {
+	const existing = await db.select().from(globalItems).limit(1);
 	if (existing.length > 0) return;
 
 	for (const item of seedData) {
-		db.insert(globalItems)
-			.values({
-				brand: item.brand,
-				model: item.model,
-				category: item.category ?? null,
-				weightGrams: item.weightGrams ?? null,
-				priceCents: item.priceCents ?? null,
-				description: item.description ?? null,
-			})
-			.run();
+		await db.insert(globalItems).values({
+			brand: item.brand,
+			model: item.model,
+			category: item.category ?? null,
+			weightGrams: item.weightGrams ?? null,
+			priceCents: item.priceCents ?? null,
+			description: item.description ?? null,
+		});
 	}
+
+	await seedTags(db);
 }