Add SQL migration for user table refactor: rename 'users' to 'user', update foreign key constraints, and add unique email constraint. Update journal and snapshot metadata for migration 0121_colorful_star_brand.

packages/server/src/db/schema/user.ts

@@ -26,7 +26,7 @@ import { certificateType } from "./shared";
 // OLD TABLE
 
 // TEMP
-export const user = pgTable("users", {
+export const user = pgTable("user", {
 	id: text("id")
 		.notNull()
 		.primaryKey()