feat: implement component-item management with CRUD operations and status updates

internal/models/responses/component_item_response.go

@@ -0,0 +1,28 @@
+package responses
+
+import "encoding/json"
+
+type CreateComponentItemResponse struct {
+	ID int64 `json:"id"`
+}
+
+type UpdateComponentItemResponse struct {
+	ID          int64           `json:"id"`
+	ComponentID int64           `json:"componentId"`
+	ContainerID int64           `json:"containerId"`
+	Quantity    int32           `json:"quantity"`
+	Status      string          `json:"status"`
+	Metadata    json.RawMessage `json:"metadata"`
+}
+
+// UpdateComponentItemStatusResponse represents the response for a status change operation.
+// Different fields are populated depending on the case (change all, split, merge).
+type UpdateComponentItemStatusResponse struct {
+	ID                    int64  `json:"id"`
+	OldStatus             string `json:"oldStatus"`
+	NewStatus             string `json:"newStatus"`
+	ChangedQuantity       int32  `json:"changedQuantity"`
+	HistoryID             int64  `json:"historyId"`
+	NewComponentItemID    *int64 `json:"newComponentItemId,omitempty"`
+	MergedComponentItemID *int64 `json:"mergedComponentItemId,omitempty"`
+}