"""ml_settings.cpu_embed_enabled — the CPU embed fallback becomes a switch

B3 (operator 2026-07-02): the ml-worker's only processing role is the CPU
whole-image embed for stacks without a GPU agent. ON by default (a fresh
install works agent-less); agent-equipped stacks that drop the ml-worker
container turn it off so import hooks stop queueing embed work into a queue
nothing consumes — the daily GPU 'embed' backfill covers those images.

Revision ID: 0074
Revises: 0073
Create Date: 2026-07-02
"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "0074"
down_revision: Union[str, None] = "0073"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "ml_settings",
        sa.Column(
            "cpu_embed_enabled", sa.Boolean(), nullable=False,
            server_default=sa.true(),
        ),
    )


def downgrade() -> None:
    op.drop_column("ml_settings", "cpu_embed_enabled")