v1.3.43 — AIOSEO publish fix

What's fixed

• AIOSEO focus keyword now writes on publish — uses _aioseo_keyphrases JSON format
• AIOSEO SEO title + meta desc now write reliably — writes to both post meta and AIOSEO v4's aioseo_posts table so fields show up in WP admin immediately after publish
• Added debug info to publish response (seo_plugin + meta_written) for server-side logging