Create processing framework that allows for agent cross-talk

[beansrowning]

• BatchProcessor currently uses the assumption of independence (ie. each chunk is processed independently from each other) and there is no agent-agent communication (though it's roughly allowed via callback)
• This should be asynchronous, and probably via toolcall / callback
  • Calling agent executes toolcall / callback, which pings another agent to begin processing
  • There's probably a framework that exists for this style of communication, or I could just build it from scatch