"""Merge safety profile and checkpoint metadata heads.

Both c4_001_safety_profile_column and m6_001_checkpoint_metadata branched
from different points in the migration chain, creating two Alembic heads.
This no-op merge migration resolves them into a single head.

Revision ID: m6_002_merge_safety_and_checkpoint
Revises: c4_001_safety_profile_column, m6_001_checkpoint_metadata
Create Date: 2026-03-02 00:00:00

"""

from collections.abc import Sequence

# revision identifiers, used by Alembic.
revision: str = "m6_002_merge_safety_and_checkpoint"
down_revision: str | Sequence[str] | None = (
    "c4_001_safety_profile_column",
    "m6_001_checkpoint_metadata",
)
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    """Upgrade schema."""
    pass


def downgrade() -> None:
    """Downgrade schema."""
    pass
