feat(db): user email unsubscription

src/migrations/20241031102325-user-unsubscription.js

@@ -0,0 +1,15 @@
+exports.up = function(db, cb) {
+    db.runSql(`
+    CREATE TABLE IF NOT EXISTS user_unsubscription
+    (
+        user_id INTEGER NOT NULL references users (id),
+        subscription VARCHAR(255) NOT NULL,
+        created_at TIMESTAMP DEFAULT now(),
+        PRIMARY KEY (user_id, subscription)
+    );
+`, cb);
+};
+
+exports.down = function(db, cb) {
+    db.runSql(`DROP TABLE IF EXISTS user_unsubscription;`, cb);
+};