feat: Konto-Saldo-Anker mit ankerbasierter Saldenrechnung

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

finance/alembic/versions/1ef6a356f028_konto_anker.py

@@ -0,0 +1,34 @@
+"""konto anker
+
+Revision ID: 1ef6a356f028
+Revises: b2b1f5a18a74
+Create Date: 2026-07-19 21:18:41.888568
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '1ef6a356f028'
+down_revision: Union[str, Sequence[str], None] = 'b2b1f5a18a74'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('accounts', sa.Column('anchor_date', sa.Date(), nullable=True))
+    op.add_column('accounts', sa.Column('anchor_balance', sa.Numeric(precision=12, scale=2), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('accounts', 'anchor_balance')
+    op.drop_column('accounts', 'anchor_date')
+    # ### end Alembic commands ###