* Change document-rag and graph-rag processing so that the user can
specify parameters. Changes in Pulsar services, Pulsar message
schemas, gateway and command-line tools. User-visible changes in
new parameters on command-line tools.
* Fix bugs, graph-rag working
* Get subgraph truncation in the right place
* Graph RAG and document RAG working and configurable
* Multi-hop path traversal GraphRAG
* Add safety valve for path_size set too high
* Acknowledge messaages from Pulsar, doh!
* Change API to deliver a boolean e if value is an entity
* Change loaders to use new API
* Changes, entity-aware API is complete