"""Arbeitsnotiz je Chat (Zusammenfassung älterer Nachrichten)

Revision ID: 0017
Revises: 0016
Erstellt: 2026-10-22 14:08:39.682569
"""

import sqlalchemy as sa
from alembic import op


revision = '0017'
down_revision = '0016'
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.add_column('chat_sessions', sa.Column('summary', sa.Text(), server_default='', nullable=False))
    op.add_column('chat_sessions', sa.Column('summary_upto', sa.Integer(), nullable=True))


def downgrade() -> None:
    op.drop_column('chat_sessions', 'summary_upto')
    op.drop_column('chat_sessions', 'summary')