feat: impl MCDatabase for mariadb

db/db-sqlx-maria/migrations/20210310122617_mcaptcha_config.sql

@@ -0,0 +1,16 @@
+-- TODO: changed key -> captcha_key
+
+CREATE TABLE IF NOT EXISTS mcaptcha_config (
+	config_id INT auto_increment,
+	PRIMARY KEY(config_id),
+	user_id INT NOT NULL,
+	captcha_key varchar(100) NOT NULL UNIQUE,
+	name varchar(100) NOT NULL,
+	duration integer NOT NULL DEFAULT 30,
+
+	CONSTRAINT `fk_mcaptcha_user`
+		FOREIGN KEY (user_id)
+		REFERENCES mcaptcha_users (ID)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE
+);