* Fixes for missing company object in events
* Cleanup client balancing code
* Fixes for client balance
* Fixes for missing company variable
* Fix activity transformer to prevent multiple DB calls
* Update client paid to date job:
* Backup Invoice HTML when invoice is marked as sent and paid
* Store HTML of invoice when invoice was paid
* Fix foreign keys in db schema
* V2 Endpoints for Company Migrations
* Fixes for tests