Add initial project configuration and setup for Reference Board Viewer application. Include EditorConfig for consistent coding styles, pre-commit hooks for linting and formatting, Docker Compose for local development with PostgreSQL and MinIO, and a Nix flake for development environment management. Establish CI/CD pipeline for automated testing and deployment.

backend/app/database/models/__init__.py

@@ -0,0 +1,5 @@
+"""Database models."""
+
+# Import all models here for Alembic autogenerate
+# Models will be created in separate phases
+