Multi-tenant PostgreSQL schema

The DataLens Platform uses a multi-tenant PostgreSQL schema for data management. DataLens Platform uses a multi-tenant PostgreSQL schema for organizations, users, projects, files, and catalog data. The Backend uses a PostgreSQL schema Project 14 will transition to using its own PostgreSQL schema for extracted data storage. Each project schema such as Project 14's schema is a distinct namespace within PostgreSQL. The Platform Backend uses a multi-tenant PostgreSQL schema to support data modeling and authentication. The DataLens platform backend uses a multi-org data model.