[WIP] Use pgvector

[murbans1]

No description provided.

[murbans1]

Can be run

docker compose up - to run pgvector
uv run createvectordb_csv_to_pgvector_local.py ../../scripts/output_files
uv run serverragllm_csv_to_pgvector_local.py
curl "http://127.0.0.1:8000/answer/How%20to%20install%20luna%20?"

It still needs yamls to install pgvector on k8s and some refactor, to add a abstraction layer above data storage (faiss or pgvector or anything we decide to use).