Autocalls AI + Postscript Integration

Keep Autocalls AI and Postscript aligned: when communication events happen in one, update the other automatically.

Example: when Autocalls AI's "Watch Calls" fires, WEXTL can "Create a Subscriber" in Postscript. Autocalls AI has 3 triggers (including Watch Calls, Watch Inbound Events, and Watch Leads); Postscript has 8 actions (including Create a Subscriber, Get a Message, and Get a Message Request).