feat(29-01): add dominantColor and crop fields to schema

Add dominant_color, crop_zoom, crop_x, crop_y columns to items,
global_items, and thread_candidates tables.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/db/schema.ts

@@ -58,6 +58,10 @@ export const items = pgTable("items", {
 	globalItemId: integer("global_item_id").references(() => globalItems.id),
 	purchasePriceCents: integer("purchase_price_cents"),
 	brand: text("brand"),
+	dominantColor: text("dominant_color"),
+	cropZoom: doublePrecision("crop_zoom"),
+	cropX: doublePrecision("crop_x"),
+	cropY: doublePrecision("crop_y"),
 	createdAt: timestamp("created_at").defaultNow().notNull(),
 	updatedAt: timestamp("updated_at").defaultNow().notNull(),
 });
@@ -96,6 +100,10 @@ export const threadCandidates = pgTable("thread_candidates", {
 	productUrl: text("product_url"),
 	imageFilename: text("image_filename"),
 	imageSourceUrl: text("image_source_url"),
+	dominantColor: text("dominant_color"),
+	cropZoom: doublePrecision("crop_zoom"),
+	cropX: doublePrecision("crop_x"),
+	cropY: doublePrecision("crop_y"),
 	status: text("status").notNull().default("researching"),
 	pros: text("pros"),
 	cons: text("cons"),
@@ -147,6 +155,10 @@ export const globalItems = pgTable(
 		sourceUrl: text("source_url"),
 		imageCredit: text("image_credit"),
 		imageSourceUrl: text("image_source_url"),
+		dominantColor: text("dominant_color"),
+		cropZoom: doublePrecision("crop_zoom"),
+		cropX: doublePrecision("crop_x"),
+		cropY: doublePrecision("crop_y"),
 		createdAt: timestamp("created_at").defaultNow().notNull(),
 	},
 	(table) => [unique().on(table.brand, table.model)],