blog: take the reviewed copy, and change author and slug

Brings the post in line with the reviewed doc. Dimitrie Hoekstra as author.
Slug moves to industrial-ai-agent, which is what the doc specifies and what the
metadata is written around; nothing linked to the old one.

Content changes of substance: a comparison table for what changes with an
integrated agent, the granting section says what editing rights actually permit,
and Where to start splits Cloud from self-hosted with the Team Broker note the
self-hosted path needs. The separate Connect your own agent heading folds into
the section above it, where the picker already sat. The FAQ and the meta
description are the reviewed versions. Ends on the starter prompts carousel.

Still needs an Art Request before it publishes.

Author: dimitrieh