fix(db): 使用应用层 crypto.randomUUID 替代数据库默认生成，彻底解决主键 null 报错

src/db/schema.ts

@@ -1,7 +1,7 @@
 import { pgTable, uuid, varchar, timestamp, pgEnum, numeric } from "drizzle-orm/pg-core";
 
 export const users = pgTable("users", {
-  id: uuid("id").primaryKey().defaultRandom(),
+  id: uuid("id").primaryKey().$defaultFn(() => crypto.randomUUID()),
   username: varchar("username", { length: 50 }).notNull().unique(),
   passwordHash: varchar("password_hash", { length: 255 }).notNull(),
   createdAt: timestamp("created_at", { withTimezone: true, mode: "date" })
@@ -16,7 +16,7 @@ export const assetTypeEnum = pgEnum("asset_type_enum", [
 ]);
 
 export const assets = pgTable("assets", {
-  id: uuid("id").primaryKey().defaultRandom(),
+  id: uuid("id").primaryKey().$defaultFn(() => crypto.randomUUID()),
   symbol: varchar("symbol", { length: 20 }).notNull().unique(),
   type: assetTypeEnum("type").notNull(),
   baseCurrency: varchar("base_currency", { length: 10 }).notNull(),
@@ -33,7 +33,7 @@ export const transactionTypeEnum = pgEnum("transaction_type_enum", [
 ]);
 
 export const transactions = pgTable("transactions", {
-  id: uuid("id").primaryKey().defaultRandom(),
+  id: uuid("id").primaryKey().$defaultFn(() => crypto.randomUUID()),
   assetId: uuid("asset_id")
     .notNull()
     .references(() => assets.id),