feat: persist preferred project by account key

Author: jonathanlab

apps/code/src/main/db/migrations/0004_auth_preferences.sql

@@ -0,0 +1,9 @@
+CREATE TABLE `auth_preferences` (
+	`account_key` text NOT NULL,
+	`cloud_region` text NOT NULL,
+	`last_selected_project_id` integer,
+	`created_at` text DEFAULT (CURRENT_TIMESTAMP) NOT NULL,
+	`updated_at` text DEFAULT (CURRENT_TIMESTAMP) NOT NULL
+);
+--> statement-breakpoint
+CREATE INDEX `auth_preferences_account_region_idx` ON `auth_preferences` (`account_key`,`cloud_region`);