feat(36-01): add isAdmin column to users table schema and generate migration

- Add isAdmin boolean(is_admin) NOT NULL DEFAULT false to users table
- Generate migration 0009_spotty_lord_tyger.sql
- NOTE: db:push requires DATABASE_URL with correct credentials to apply

src/db/schema.ts

@@ -18,6 +18,7 @@ export const users = pgTable("users", {
 	displayName: text("display_name"),
 	avatarUrl: text("avatar_url"),
 	bio: text("bio"),
+	isAdmin: boolean("is_admin").notNull().default(false),
 	createdAt: timestamp("created_at").defaultNow().notNull(),
 });