chore: minor fixes and formatting

repositories/invoices.py

@@ -1,9 +1,7 @@
-from typing import Optional
-
 from sqlalchemy import select
-from db.models import Invoice
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from db.models import Invoice
 from db.models.invoices import InvoiceStatus
 
 
@@ -14,7 +12,7 @@ class InvoiceRepository:
         *,
         amount: int,
         creator_id: int,
-        inline_message_id: Optional[int] = None,
+        inline_message_id: int | None = None,
         status: InvoiceStatus = InvoiceStatus.PENDING,
     ) -> Invoice:
         invoice = Invoice(
@@ -28,9 +26,7 @@ class InvoiceRepository:
         await session.commit()
         return invoice
 
-    async def get_invoice_by_id(
-        self, session: AsyncSession, invoice_id: int
-    ) -> Optional[Invoice]:
+    async def get_invoice_by_id(self, session: AsyncSession, invoice_id: int) -> Invoice | None:
         stmt = select(Invoice).where(Invoice.id == invoice_id)
         return await session.scalar(stmt)