feat: implement domain guard for commission calculation and enhance representation dashboard

- Added domain guard in CommissionService to ensure commission is calculated only when the appointment is booked under the same representation as the doctor.
- Updated RepresentationController to filter statistics by representation, ensuring accurate data is shown for each representative.
- Introduced new endpoints for the representation dashboard to provide summary statistics, doctor performance, and financial reports.
- Created new pages for RepresentationFinance and RepresentationSettlement to display financial data and allow for settlement requests.
- Added migration to include booking_representation_id in appointments for tracking the representative under which the appointment was booked.

assets/admin/components/layout/Sidebar.tsx

@@ -383,6 +383,13 @@ function buildSections(
                     { to: "/admin/appointments", icon: CalendarDaysIcon, label: "نوبت‌ها" },
                 ],
             },
+            {
+                label: "مالی",
+                items: [
+                    { to: "/admin/representation-finance", icon: CreditCardIcon, label: "گزارش مالی" },
+                    { to: "/admin/representation-settlement", icon: BanknotesIcon, label: "تسویه حساب" },
+                ],
+            },
         ];
     }