[add] migration script

api/migrations/versions/f017efe4831c_202603181652.py

@@ -0,0 +1,30 @@
+"""202603181652
+
+Revision ID: f017efe4831c
+Revises: 818c6c535e14
+Create Date: 2026-03-18 16:52:21.639695
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = 'f017efe4831c'
+down_revision: Union[str, None] = '818c6c535e14'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('workflow_configs', sa.Column('features', postgresql.JSONB(astext_type=sa.Text()), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('workflow_configs', 'features')
+    # ### end Alembic commands ###