feat: Implement bulk update for product prices and stock, and add low stock products query and toggle product status functionality

src/CMSMicroservice.Protobuf/Protos/products.proto

@@ -43,6 +43,29 @@ service ProductsContract
             
         };
     };
+    rpc BulkUpdateProductPrices(BulkUpdateProductPricesRequest) returns (BulkUpdateProductPricesResponse){
+        option (google.api.http) = {
+            post: "/BulkUpdateProductPrices"
+            body: "*"
+        };
+    };
+    rpc BulkUpdateProductStock(BulkUpdateProductStockRequest) returns (BulkUpdateProductStockResponse){
+        option (google.api.http) = {
+            post: "/BulkUpdateProductStock"
+            body: "*"
+        };
+    };
+    rpc GetLowStockProducts(GetLowStockProductsRequest) returns (GetLowStockProductsResponse){
+        option (google.api.http) = {
+            get: "/GetLowStockProducts"
+        };
+    };
+    rpc ToggleProductStatus(ToggleProductStatusRequest) returns (ToggleProductStatusResponse){
+        option (google.api.http) = {
+            post: "/ToggleProductStatus"
+            body: "*"
+        };
+    };
 }
 message CreateNewProductsRequest
 {
@@ -155,3 +178,99 @@ message GetAllProductsByFilterResponseModel
     // لیست شناسه دسته‌بندی‌های محصول
     repeated int64 category_ids = 14;
 }
+
+// Bulk Update Product Prices
+message BulkUpdateProductPricesRequest
+{
+    repeated ProductPriceUpdate products = 1;
+}
+
+message ProductPriceUpdate
+{
+    int64 product_id = 1;
+    int64 new_price = 2;
+    google.protobuf.Int32Value new_discount = 3;
+    google.protobuf.Int32Value new_club_discount_percent = 4;
+}
+
+message BulkUpdateProductPricesResponse
+{
+    int32 total = 1;
+    int32 succeeded = 2;
+    int32 failed = 3;
+    repeated BulkOperationError errors = 4;
+}
+
+message BulkOperationError
+{
+    int64 product_id = 1;
+    string error_message = 2;
+}
+
+// Bulk Update Product Stock
+message BulkUpdateProductStockRequest
+{
+    repeated ProductStockUpdate products = 1;
+    StockUpdateType update_type = 2;
+}
+
+message ProductStockUpdate
+{
+    int64 product_id = 1;
+    int32 quantity = 2;
+}
+
+enum StockUpdateType
+{
+    SET = 0;
+    ADD = 1;
+    SUBTRACT = 2;
+}
+
+message BulkUpdateProductStockResponse
+{
+    int32 total = 1;
+    int32 succeeded = 2;
+    int32 failed = 3;
+    repeated BulkOperationError errors = 4;
+}
+
+// Get Low Stock Products
+message GetLowStockProductsRequest
+{
+    int32 threshold = 1;
+    int32 page_index = 2;
+    int32 page_size = 3;
+    google.protobuf.BoolValue is_club_exclusive = 4;
+}
+
+message GetLowStockProductsResponse
+{
+    messages.MetaData meta_data = 1;
+    repeated LowStockProduct products = 2;
+}
+
+message LowStockProduct
+{
+    int64 id = 1;
+    string title = 2;
+    int32 remaining_count = 3;
+    int64 price = 4;
+    bool is_club_exclusive = 5;
+}
+
+// Toggle Product Status
+message ToggleProductStatusRequest
+{
+    repeated int64 product_ids = 1;
+    bool enable = 2;
+    int32 default_stock = 3;
+}
+
+message ToggleProductStatusResponse
+{
+    int32 total = 1;
+    int32 succeeded = 2;
+    int32 failed = 3;
+    repeated BulkOperationError errors = 4;
+}