[FEAT] material standard_total_cost 컬럼 추가

src/main/java/com/sampoom/backend/api/material/entity/Material.java

@@ -40,9 +40,19 @@ public class Material {
 
     private Long standardCost; // 표준단가
 
+    @Column(name = "standard_total_cost")
+    private Long standardTotalCost; // 표준총비용 (standardCost * standardQuantity)
+
     @Version
     private Long version; // JPA가 자동 관리 (낙관적 락 + 자동 증가)
 
+    @PostLoad
+    @PrePersist
+    @PreUpdate
+    private void updateStandardTotalCost() {
+        this.standardTotalCost = calculateStandardTotalCost();
+    }
+
     /** 이름/단위/기준단위/리드타임/기준수량 수정 */
     public void updateBasicInfo(String name, String unit, Integer baseQuantity, Integer standardQuantity, Integer leadTime, Long standardCost) {
         this.name = name;
@@ -51,11 +61,32 @@ public void updateBasicInfo(String name, String unit, Integer baseQuantity, Inte
         this.standardQuantity = standardQuantity != null ? standardQuantity : 1;
         this.leadTime = leadTime;
         this.standardCost = standardCost;
+        updateStandardTotalCost();
     }
 
     /** 카테고리 변경 + 코드 재발급 */
     public void changeCategory(MaterialCategory newCategory, String newCode) {
         this.materialCategory = newCategory;
         this.materialCode = newCode;
     }
+
+    /** 표준총비용 계산 */
+    private Long calculateStandardTotalCost() {
+        if (this.standardCost == null || this.standardQuantity == null) {
+            return null;
+        }
+        return this.standardCost * this.standardQuantity;
+    }
+
+    /** 표준비용 업데이트 시 총비용도 함께 업데이트 */
+    public void updateStandardCost(Long standardCost) {
+        this.standardCost = standardCost;
+        updateStandardTotalCost();
+    }
+
+    /** 표준수량 업데이트 시 총비용도 함께 업데이트 */
+    public void updateStandardQuantity(Integer standardQuantity) {
+        this.standardQuantity = standardQuantity != null ? standardQuantity : 1;
+        updateStandardTotalCost();
+    }
 }

src/main/java/com/sampoom/backend/api/material/event/dto/MaterialEvent.java

@@ -32,5 +32,6 @@ public static class Payload {
         private boolean deleted;
         private Long materialCategoryId;
         private Long standardCost;
+        private Long standardTotalCost; // 표준총비용 추가
     }
 }

src/main/java/com/sampoom/backend/api/material/event/service/MaterialEventBatchService.java

@@ -44,6 +44,7 @@ public void publishAllMaterialEvents() {
                                 .standardQuantity(material.getStandardQuantity() != null ? material.getStandardQuantity() : 1)
                                 .leadTime(material.getLeadTime())
                                 .standardCost(material.getStandardCost())
+                                .standardTotalCost(material.getStandardTotalCost())
                                 .deleted(false)
                                 .materialCategoryId(material.getMaterialCategory().getId())
                                 .build())

src/main/java/com/sampoom/backend/api/material/service/MaterialService.java

@@ -126,6 +126,7 @@ public MaterialResponseDTO createMaterial(MaterialRequestDTO requestDTO) {
                         .deleted(false)
                         .materialCategoryId(category.getId())
                         .standardCost(material.getStandardCost())
+                        .standardTotalCost(material.getStandardTotalCost())
                         .build())
                 .build();
 
@@ -188,6 +189,7 @@ public MaterialResponseDTO updateMaterial(Long id, MaterialRequestDTO requestDTO
                         .deleted(false)
                         .materialCategoryId(material.getMaterialCategory().getId())
                         .standardCost(material.getStandardCost())
+                        .standardTotalCost(material.getStandardTotalCost())
                         .build())
                 .build();
 
@@ -225,6 +227,7 @@ public void deleteMaterial(Long id) {
                         .deleted(true)
                         .materialCategoryId(material.getMaterialCategory().getId())
                         .standardCost(material.getStandardCost())
+                        .standardTotalCost(material.getStandardTotalCost())
                         .build())
                 .build();