feat(nodestore): add Postgres for the doc and index store (#1706)

* Adding Postgres for the doc and index store

* Adding documentation.  Rename postgres database local->simple.  Postgres storage dependencies

* Update documentation for postgres storage

* Renaming feature to nodestore

* update docstore -> nodestore in doc

* missed some docstore changes in doc

* Updated poetry.lock

* Formatting updates to pass ruff/black checks

* Correction to unreachable code!

* Format adjustment to pass black test

* Adjust extra inclusion name for vector pg

* extra dep change for pg vector

* storage-postgres -> storage-nodestore-postgres

* Hash change on poetry lock

settings-ollama-pg.yaml

@@ -0,0 +1,43 @@
+# Using ollama and postgres for the vector, doc and index store. Ollama is also used for embeddings.
+# To use install these extras:
+# poetry install --extras "llms-ollama ui vector-stores-postgres embeddings-ollama storage-nodestore-postgres"
+server:
+  env_name: ${APP_ENV:ollama}
+
+llm:
+  mode: ollama
+  max_new_tokens: 512
+  context_window: 3900
+
+embedding:
+  mode: ollama
+
+ollama:
+  llm_model: mistral
+  embedding_model: nomic-embed-text
+  api_base: http://localhost:11434
+
+nodestore:
+  database: postgres
+
+vectorstore:
+  database: pgvector
+
+pgvector:
+  host: localhost
+  port: 5432
+  database: postgres
+  user: postgres
+  password: admin
+  embed_dim: 768
+  schema_name: private_gpt
+  table_name: embeddings
+
+postgres:
+  host: localhost
+  port: 5432
+  database: postgres
+  user: postgres
+  password: admin
+  schema_name: private_gpt
+