"""Метка спавна регулярной задачи (ТЗ 3.5): spawned_at против дубликатов.

Revision ID: d5e6a7b8c9d0
Revises: a5b6c7d8e9f0
Create Date: 2026-09-21 12:00:00.000000
"""

from collections.abc import Sequence

import sqlalchemy as sa

from alembic import op

revision: str = "d5e6a7b8c9d0"
down_revision: str | Sequence[str] | None = "a5b6c7d8e9f0"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.add_column("tasks", sa.Column("spawned_at", sa.DateTime(timezone=True), nullable=True))


def downgrade() -> None:
    op.drop_column("tasks", "spawned_at")