feat: attributes in cards and projects

models/attribute.py

@@ -37,13 +37,15 @@ class Attribute(BaseModel):
 
     id: Mapped[int] = mapped_column(primary_key=True)
     label: Mapped[str] = mapped_column(nullable=False)
-    name: Mapped[str] = mapped_column(nullable=False, unique=True)
+    name: Mapped[str] = mapped_column(nullable=False, index=True)
     is_applicable_to_group: Mapped[bool] = mapped_column(
         default=False,
         comment='Применять ли изменения атрибута карточки ко всем карточкам в группе',
     )
     is_nullable: Mapped[bool] = mapped_column(default=False, nullable=False)
     default_value: Mapped[bytes] = mapped_column(nullable=True)
+    is_deleted: Mapped[bool] = mapped_column(default=False)
+    description: Mapped[str] = mapped_column(default="", nullable=False)
 
     projects: Mapped[list['Project']] = relationship(
         'Project',