feat(housekeeping): add audit and preference storage

drizzle/migrations/0023_housekeeping.sql

@@ -0,0 +1,17 @@
+-- Housekeeping audit correlation and user presentation preferences.
+-- Additive only: this shared schema is also consumed by the emulator.
+ALTER TABLE `admin_audit_log`
+	ADD COLUMN `correlation_id` VARCHAR(64) NULL,
+	ADD COLUMN `outcome` VARCHAR(32) NULL,
+	ADD COLUMN `reason` TEXT NULL,
+	ADD COLUMN `domain` VARCHAR(32) NULL,
+	ADD INDEX `admin_audit_log_correlation_id_idx` (`correlation_id`);
+
+CREATE TABLE `housekeeping_user_preferences` (
+	`user_id` INT NOT NULL,
+	`schema_version` INT NOT NULL DEFAULT 1,
+	`payload` LONGTEXT NOT NULL,
+	`created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+	`updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+	PRIMARY KEY (`user_id`)
+);