✨ Adopt SQLModel, create models, start using it (#559)

* 🔥 Remove old SQLAlchemy models

* ✨ Add new SQLModel models

* 🔧 Update Alembic configs to work with SQLModel

* ✨ Re-generate initial Alembic migration

* 🔧 Update PostgreSQL driver connection string URL

* ✨ Create new SQLModel engine

* 🔥 Remove old unneeded SQLAlchemy-specific files

* ♻️ Update init_db

* ♻️ Use new SQLModel session

* ♻️ Update conftest with new DB Session

* ♻️ Update pre-start scripts to use SQLModel session

* ♻️ Import new SQLModel models

* ✨ Create new simplified create_user crud util

* ♻️ Update import in CRUDBase class (soon to be removed)

* 🙈 Update .gitignore with Python files

src/backend/app/alembic/env.py

@@ -20,9 +20,9 @@ fileConfig(config.config_file_name)
 # target_metadata = mymodel.Base.metadata
 # target_metadata = None
 
-from app.db.base import Base  # noqa
+from app.models import SQLModel  # noqa
 
-target_metadata = Base.metadata
+target_metadata = SQLModel.metadata
 
 # other values from the config, defined by the needs of env.py,
 # can be acquired:
@@ -35,7 +35,7 @@ def get_url():
     password = os.getenv("POSTGRES_PASSWORD", "")
     server = os.getenv("POSTGRES_SERVER", "db")
     db = os.getenv("POSTGRES_DB", "app")
-    return f"postgresql://{user}:{password}@{server}/{db}"
+    return f"postgresql+psycopg://{user}:{password}@{server}/{db}"
 
 
 def run_migrations_offline():