feat: enhance organization management; add member registration and validation, update user registration flow, and improve enum handling

app/models/base.py

@@ -1,6 +1,13 @@
 """Declarative base for SQLAlchemy models."""
+from __future__ import annotations
+
+from enum import StrEnum
+from typing import TypeVar
+
 from sqlalchemy.orm import DeclarativeBase, declared_attr
 
+EnumT = TypeVar("EnumT", bound=StrEnum)
+
 
 class Base(DeclarativeBase):
     """Base class that configures naming conventions."""
@@ -8,3 +15,9 @@ class Base(DeclarativeBase):
     @declared_attr.directive
     def __tablename__(cls) -> str:  # type: ignore[misc]
         return cls.__name__.lower()
+
+
+def enum_values(enum_cls: type[EnumT]) -> list[str]:
+    """Return enum member values to keep DB representation stable."""
+
+    return [member.value for member in enum_cls]