feat: Engine+Schema fuer Szenario-Ende und szenario-eigene Einmalzahlungen

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

finance/alembic/versions/c4d7e2a91b53_szenario_ende.py

@@ -0,0 +1,37 @@
+"""szenario ende + scenario_planned_items
+
+Revision ID: c4d7e2a91b53
+Revises: 1ef6a356f028
+Create Date: 2026-07-20
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision: str = 'c4d7e2a91b53'
+down_revision: Union[str, Sequence[str], None] = '1ef6a356f028'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column('scenario_modifiers', sa.Column('end_date', sa.Date(), nullable=True))
+    op.create_table(
+        'scenario_planned_items',
+        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column('scenario_id', sa.Integer(), sa.ForeignKey('scenarios.id'), nullable=False),
+        sa.Column('name', sa.String(length=200), nullable=False),
+        sa.Column('amount', sa.Numeric(precision=12, scale=2), nullable=False),
+        sa.Column('due', sa.Date(), nullable=False),
+    )
+    op.create_index('ix_scenario_planned_items_scenario_id',
+                    'scenario_planned_items', ['scenario_id'])
+
+
+def downgrade() -> None:
+    op.drop_index('ix_scenario_planned_items_scenario_id', 'scenario_planned_items')
+    op.drop_table('scenario_planned_items')
+    op.drop_column('scenario_modifiers', 'end_date')