Query metadata, migrations and formatting

migrations/20250824094333_make_status_not_null_in_subscriptions.sql

@@ -0,0 +1,4 @@
+BEGIN;
+    UPDATE subscriptions SET status = 'confirmed' WHERE status IS NULL;
+    ALTER TABLE subscriptions ALTER COLUMN status SET NOT NULL;
+COMMIT;

migrations/20250824094701_create_subscription_tokens_table.sql

@@ -0,0 +1,5 @@
+CREATE TABLE subscription_tokens (
+    subscription_token TEXT NOT NULL,
+    subscriber_id UUID NOT NULL REFERENCES subscriptions (id),
+    PRIMARY KEY (subscription_token)
+);