When master is in delegate-only mode, USDU nodes are swapped to a
lightweight USDUDelegateCollector that skips model loading and only
collects results from workers. Workers initialize the dynamic job
queue on the master via a new /distributed/init_dynamic_job endpoint
since the delegate master doesn't know the batch size.
- Remove DistributedListSplitter and DistributedListCollector nodes
- Remove /distributed/init_list_queue and /distributed/request_list_item endpoints
- Clean up all references from prompt_transform, queue_orchestration, constants, and tests
- Refactor and reorganize distributed modules for quality improvements
Robert Wojciechowski