Initial public release

Aurum — a self-hosted personal finance operating system: cash flow,
net worth tracking, budgets, goals, recurring payments, reports,
proactive alerts, and a compound-interest returns calculator, all
bilingual (RU/EN) and mobile-first. Ships as a three-container Docker
Compose stack (Postgres + FastAPI + nginx-served React frontend).

See README.md for setup and CONTRIBUTING.md for development.

backend/app/schemas/cash_flow.py

@@ -0,0 +1,21 @@
+from datetime import date as date_
+from decimal import Decimal
+
+from pydantic import BaseModel
+
+
+class CashFlowPoint(BaseModel):
+    year: int
+    month: int
+    income: Decimal
+    expense: Decimal
+    net: Decimal
+
+
+class CashFlowResponse(BaseModel):
+    start_date: date_ | None
+    end_date: date_ | None
+    points: list[CashFlowPoint]
+    total_income: Decimal
+    total_expense: Decimal
+    total_net: Decimal