feat(api): complete phase 9 mobile contracts

server/db/migrations/0007_flaky_kinsey_walden.sql

@@ -0,0 +1,8 @@
+CREATE TABLE `instance_settings` (
+	`key` text PRIMARY KEY NOT NULL,
+	`instance_id` text NOT NULL,
+	`created_at` text DEFAULT CURRENT_TIMESTAMP NOT NULL,
+	`updated_at` text DEFAULT CURRENT_TIMESTAMP NOT NULL
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `instance_settings_instance_id_unique` ON `instance_settings` (`instance_id`);