* Port a number of commands to use API gateway instead of Pulsar
* Ported tg-invoke-agent to websockets API
* Rename the 2 RAG commands: tg-query-... to tg-invoke-...
* Update schema defs for source -> metadata
* Migrate to use metadata part of schema, also add metadata to triples & vecs
* Add user/collection metadata to query
* Use user/collection in RAG
* Write and query working on triples