ParallelPOS SEO Meta Bridge

A tiny, single-purpose bridge: it registers the SEO title and meta
description fields of Yoast SEO and Rank Math with the WordPress REST
API, so tools you connect (such as the ParallelPOS back office) can
update them for you.

• No settings screen, no admin pages.
• No data collection, no external calls — it only registers four meta
  keys with the REST API.
• Writes are only allowed for logged-in users who can edit the post
  (the same permission WordPress itself requires).