feat: implement MySQL driver and API schema services for database management

backend/app/Contracts/DatabaseDriverInterface.php

@@ -33,4 +33,19 @@ interface DatabaseDriverInterface
      * Get the underlying connection instance.
      */
     public function getConnection();
+
+    /**
+     * Export the database.
+     */
+    public function export(array $config): string;
+
+    /**
+     * Import the database.
+     */
+    public function import(array $config, string $filePath): bool;
+
+    /**
+     * Get database metadata (charset, collation, size, etc.)
+     */
+    public function getDatabaseMetadata(string $database): array;
 }