feat: Implement Cancel Order functionality with command, handler, and validation

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

@@ -254,6 +254,7 @@ message GetWithdrawalRequestsRequest
     google.protobuf.StringValue week_number = 3;
     int32 page_index = 4;
     int32 page_size = 5;
+    string iban_number = 6;
 }
 
 message GetWithdrawalRequestsResponse
@@ -277,6 +278,9 @@ message WithdrawalRequestModel
     string processed_by = 11;
     string reason = 12;
     google.protobuf.Timestamp created = 13;
+    string bank_reference_id = 14;
+    string bank_tracking_code = 15;
+    string payment_failure_reason = 16;
 }
 
 // ============ Worker Control APIs ============

src/Protobufs/BackOffice.BFF.UserOrder.Protobuf/Protos/userorder.proto

@@ -64,6 +64,12 @@ service UserOrderContract
     };
     
     // Order Management
+    rpc CancelOrder(CancelOrderRequest) returns (CancelOrderResponse){
+        option (google.api.http) = {
+            post: "/CancelOrder"
+            body: "*"
+        };
+    };
     rpc UpdateOrderStatus(UpdateOrderStatusRequest) returns (UpdateOrderStatusResponse){
         option (google.api.http) = {
             post: "/UpdateOrderStatus"
@@ -342,3 +348,19 @@ message DecimalValue
 
     sfixed32 nanos = 2;
 }
+
+// CancelOrder Messages
+message CancelOrderRequest
+{
+    int64 order_id = 1;
+    string cancel_reason = 2;
+    bool refund_payment = 3;
+}
+
+message CancelOrderResponse
+{
+    int64 order_id = 1;
+    int32 status = 2;
+    string message = 3;
+    bool refund_processed = 4;
+}