feat: profit chart in statistics

test.py

@@ -1,21 +1,30 @@
 import asyncio
+import datetime
 
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from backend.session import session_maker
-from services.billing import BillingService
+from schemas.statistics import GetProfitDataRequest
+from services.statistics import StatisticsService
 
 
 async def main():
     session: AsyncSession = session_maker()
 
+    request = GetProfitDataRequest(
+        date_range=(
+            datetime.date(2020, 1, 1),
+            datetime.date(2020, 1, 31),
+        ),
+    )
+
     try:
-        service = BillingService(session)
+        service = StatisticsService(session)
 
-        pdf_file = await service.create_billing_document_pdf(121)
+        result = await service.get_profit_data(request)
 
-        with open("report.pdf", "wb") as f:
-            f.write(pdf_file.getvalue())
+        # for res in result:
+        #     print(res)
     finally:
         await session.close()