feat: Implement Discount Product and Shopping Cart functionalities

- Added UpdateDiscountProductCommandValidator for validating discount product updates.
- Created GetDiscountProductByIdQuery and its handler for retrieving discount product details by ID.
- Implemented GetDiscountProductsQuery and handler for fetching a list of discount products with filtering options.
- Developed AddToCartCommand and handler for adding products to the shopping cart.
- Implemented ClearCartCommand and handler for clearing the shopping cart.
- Created RemoveFromCartCommand and handler for removing items from the cart.
- Added UpdateCartItemCountCommand and handler for updating the quantity of items in the cart.
- Developed GetUserCartQuery and handler for retrieving the user's shopping cart details.
- Implemented Product Tag functionalities including assigning tags to products, creating, updating, and deleting tags.
- Added queries for fetching all tags and products by tag.

src/Protobufs/BackOffice.BFF.Commission.Protobuf/Protos/commission.proto

@@ -48,6 +48,8 @@ service CommissionContract
     };
     rpc GetWorkerExecutionLogs(GetWorkerExecutionLogsRequest) returns (GetWorkerExecutionLogsResponse){
     };
+    rpc GetWithdrawalReports(GetWithdrawalReportsRequest) returns (GetWithdrawalReportsResponse){
+    };
 }
 
 // ============ Commands ============
@@ -347,3 +349,47 @@ message WorkerExecutionLogModel
     int32 records_processed = 9;
     google.protobuf.StringValue details = 10; // JSON or text details
 }
+
+// GetWithdrawalReports Query
+message GetWithdrawalReportsRequest
+{
+    google.protobuf.Timestamp start_date = 1; // Optional - default: 30 days ago
+    google.protobuf.Timestamp end_date = 2;   // Optional - default: today
+    int32 period_type = 3; // ReportPeriodType: Daily=1, Weekly=2, Monthly=3
+    google.protobuf.Int32Value status = 4; // CommissionPayoutStatus enum (optional)
+    google.protobuf.Int64Value user_id = 5; // Optional user filter
+}
+
+message GetWithdrawalReportsResponse
+{
+    repeated PeriodReport period_reports = 1;
+    WithdrawalSummary summary = 2;
+}
+
+message PeriodReport
+{
+    string period_label = 1; // e.g., "2025-01-15", "هفته 3", "فروردین 1404"
+    google.protobuf.Timestamp start_date = 2;
+    google.protobuf.Timestamp end_date = 3;
+    int32 total_requests = 4;
+    int32 pending_count = 5;
+    int32 approved_count = 6;
+    int32 rejected_count = 7;
+    int32 completed_count = 8;
+    int32 failed_count = 9;
+    int64 total_amount = 10;
+    int64 paid_amount = 11;
+    int64 pending_amount = 12;
+}
+
+message WithdrawalSummary
+{
+    int32 total_requests = 1;
+    int64 total_amount = 2;
+    int64 total_paid = 3;
+    int64 total_pending = 4;
+    int64 total_rejected = 5;
+    int64 average_amount = 6;
+    int32 unique_users = 7;
+    float success_rate = 8; // Percentage (0-100)
+}