update

alembic/versions/c4d5e6f7a8b9_add_warning_sent_at_to_test_attempt.py

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+"""add warning_sent_at to test_attempt
+
+Revision ID: c4d5e6f7a8b9
+Revises: b1c2d3e4f5a6
+Create Date: 2026-01-06
+
+"""
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = 'c4d5e6f7a8b9'
+down_revision: str | None = 'b1c2d3e4f5a6'
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    op.add_column('test_attempts', sa.Column('warning_sent_at', sa.DateTime(), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column('test_attempts', 'warning_sent_at')