Check title+excerpt vs seo title+meta description

We need to check if SEO setting somehow defaults to these post props, would be weird if the wouldn't.

The issue names no files, tests, or entry points. Start by locating the SEO settings that provide the SEO title and meta description, then compare their defaults with the post title and excerpt; completion requires confirming whether that fallback exists and deciding what behavior should be changed.

Written by the indexing model from the issue text.