"""Add proposer_signature and proposer_public_key to musehub_proposals.

Every proposal carries an Ed25519 signature by the proposer over the
canonical PROPOSE message — binding their cryptographic identity to the
specific act of opening this proposal.

Revision ID: 0048
Revises: 0047
"""
from __future__ import annotations

import sqlalchemy as sa
from alembic import op

revision: str = "0048"
down_revision: str = "0047"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.add_column(
        "musehub_proposals",
        sa.Column("proposer_signature", sa.Text(), nullable=True),
    )
    op.add_column(
        "musehub_proposals",
        sa.Column("proposer_public_key", sa.Text(), nullable=True),
    )


def downgrade() -> None:
    op.drop_column("musehub_proposals", "proposer_public_key")
    op.drop_column("musehub_proposals", "proposer_signature")