Add equipment mention messages to card comment stream

You miss equipment mentions in busy team chat, leaving card context incomplete and slowing coordinators' response. It logs each mention as a card comment so coordinators see context and act same day.

Overview

Mentions about equipment in chat often never make it into the tracked work item, leaving coordinators blind to context. This captures each mention as a comment on the matching card so operations staff get the context they need and can act same day.