fix(api): 重构多市场日期解析并引入 upsert，彻底解决日期错位与重复写入问题

src/db/schema.ts

@@ -1,4 +1,4 @@
-import { pgTable, uuid, varchar, timestamp, pgEnum, numeric, uniqueIndex, date } from "drizzle-orm/pg-core";
+import { pgTable, uuid, varchar, timestamp, pgEnum, numeric, uniqueIndex, unique, date } from "drizzle-orm/pg-core";
 
 export const users = pgTable("users", {
   id: uuid("id").primaryKey().$defaultFn(() => crypto.randomUUID()),
@@ -86,11 +86,13 @@ export const assetPricesHistory = pgTable("asset_prices_history", {
     .references(() => assets.id),
   price: numeric("price", { precision: 36, scale: 18 }).notNull(),
   date: date("date", { mode: "string" }).notNull(),
+  updateTime: timestamp("update_time", { withTimezone: true, mode: "date" })
+    .defaultNow(),
   createdAt: timestamp("created_at", { withTimezone: true, mode: "date" })
     .defaultNow()
     .notNull(),
 }, (table) => [
-  uniqueIndex("asset_price_date_idx").on(table.assetId, table.date),
+  unique().on(table.assetId, table.date),
 ]);
 
 export const exchangeRatesHistory = pgTable("exchange_rates_history", {