code: def upgrade():
      kwargs: dict[str, str] = {}
      bind = op.get_bind()
      op.add_column(
          "dbs",
          sa.Column(
              "server_cert", sa.LargeBinary(), nullable=True, **kwargs
          ),
      )
  
imports: import sqlalchemy
  from alembic import op
label_desc: Use image node_id 1 for calling a global function with example usage: upgrade() without return types