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

app/models/activity.py

@@ -11,7 +11,7 @@ from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.types import JSON as GenericJSON, TypeDecorator
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
-from app.models.base import Base
+from app.models.base import Base, enum_values
 
 
 class ActivityType(StrEnum):
@@ -46,7 +46,9 @@ class Activity(Base):
     author_id: Mapped[int | None] = mapped_column(
         ForeignKey("users.id", ondelete="SET NULL"), nullable=True
     )
-    type: Mapped[ActivityType] = mapped_column(SqlEnum(ActivityType, name="activity_type"), nullable=False)
+    type: Mapped[ActivityType] = mapped_column(
+        SqlEnum(ActivityType, name="activity_type", values_callable=enum_values), nullable=False
+    )
     payload: Mapped[dict[str, Any]] = mapped_column(
         JSONBCompat().with_variant(GenericJSON(), "sqlite"),
         nullable=False,