Version 2.6.0

• Fix – Add cron heartbeat and use to offload feed generation from init / admin_init (performance) #1953
• Fix – Clean up background sync options (performance) #1962
• Dev – Add tracker props to understand usage of feed-based sync and other FB business config options #1972
• Dev – Configure release tooling to auto-update version numbers in code #1982
• Dev – Refactor code responsible for validating whether a product should be synced to FB into one place #1933