finer configuration on k8s

[cmdoret]

We don't currently expose all configuration options in k8s manifests:

• chroma:

  • [x] host
  • [x] port
  • [ ] collection_name
  • [ ] collection_examples
  • [ ] embedding_model_id
  • [ ] batch_size
  • [ ] persist_directory

• graphdb

  • [x] host
  • [x] port
  • [ ] repo
  • [ ] user
  • [ ] password

• chat

  • [x] openai_api_key
  • [ ] openai_api_base
  • [ ] model
  • [ ] answer_template
  • [ ] sparql_template

We may need to rethink how we structure these configurations in the manifests to avoid too much complexity.