"""run_node.cached_from

Which run a restored node's values came from. A cache hit replays no emissions,
so the series stays where it was recorded and the run that reused it points at
it rather than copying a few thousand rows per reuse.

Revision ID: d1f7a3c8b204
Revises: c9a5d1e73b48
Create Date: 2026-08-25

"""

import sqlalchemy as sa
import sqlmodel.sql.sqltypes
from alembic import op

# revision identifiers, used by Alembic.
revision = "d1f7a3c8b204"
down_revision = "c9a5d1e73b48"
branch_labels = None
depends_on = None


def upgrade():
    op.add_column(
        "run_node",
        sa.Column(
            "cached_from",
            sqlmodel.sql.sqltypes.AutoString(length=64),
            nullable=False,
            server_default="",
        ),
    )


def downgrade():
    op.drop_column("run_node", "cached_from")