loop-bb-pr

Compose a /loop that monitors a Bitbucket PR for activity (new comments, review state changes, merge, decline) via the bb-api wrapper. Use when the user says "watch bitbucket PR", "monitor BB PR", "loop-bb-pr", "слідкуй за PR", "поллі bb pr", or pastes a bitbucket.org/<workspace>/<repo>/pull-requests/<id> URL and wants periodic check-ins. Composes a paste-ready /loop block — does NOT invoke /loop (UI command). Local…