Access permissions, seed permissions, security, session, api/session improved handling + speed across the site/UX improvements

backend/app/models/__init__.py

@@ -1,3 +1,4 @@
+from app.models.access import Permission, Role, User, role_permissions
 from app.models.assumption import FreightCostRule, PackagingCostRule, ProcessCostRule
 from app.models.client_access import ClientAccessAuditEvent, ClientAccount, ClientFeatureAccess, ClientUser, ClientUserModulePermission
 from app.models.mix_calculator import MixCalculatorSession, MixCalculatorSessionLine
@@ -19,9 +20,13 @@ __all__ = [
     "MixCalculatorSessionLine",
     "MixIngredient",
     "PackagingCostRule",
+    "Permission",
     "ProcessCostRule",
     "Product",
     "RawMaterial",
     "RawMaterialPriceVersion",
+    "Role",
     "Scenario",
+    "User",
+    "role_permissions",
 ]