Refactor code structure for improved readability and maintainability

services/bff/app/models.py

@@ -0,0 +1,25 @@
+import uuid
+from datetime import UTC, datetime
+
+from sqlalchemy import DateTime, String
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+def now() -> datetime:
+    return datetime.now(UTC)
+
+
+class User(Base):
+    __tablename__ = "bff_users"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    email: Mapped[str] = mapped_column(String(320), unique=True, index=True)
+    password_hash: Mapped[str] = mapped_column(String(512))
+    display_name: Mapped[str] = mapped_column(String(160))
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=now)
+    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=now, onupdate=now)