* fix: remove groups from UserRead model
* fix: add missing system dependencies for postgres
* fix: change vector db provider environment variable name
* fix: WeaviateAdapter retrieve bug
* fix: correctly return data point objects from retrieve method
* fix: align graph object properties
* feat: add node example
* fix: don't return anything on health endpoint
* feat: add alembic migrations
* feat: align search types with the data we store and migrate search to tasks
