Convert BLOBs to strings

[zauberen]

Before, BLOBs would display an object reference since they are pulled as byte arrays. I noticed this in MariaDB specifically.

To test, run the following using ejc-sql, the blob column will appear like [B@73dbe1ae in master, with this PR you will see the actual value:

CREATE DATABASE test_db;
USE test_db;

CREATE TABLE storage_test (
    id INT AUTO_INCREMENT PRIMARY KEY,
    title VARCHAR(255) NOT NULL,
    text_content TEXT,
    blob_content BLOB
);

INSERT INTO storage_test (title, text_content, blob_content)
VALUES (
    'lorem ipsum dolor sit amet.',
    'lorem ipsum dolor sit amet. lorem ipsum dolor sit amet.',
    'lorem ipsum dolor sit amet. lorem ipsum dolor sit amet. lorem ipsum dolor sit amet.'
);
select * from test_db.storage_test;