feat(consumable): 소모품 마스터에 "규격(spec)" 필드 추가

품목의 규격 정보(예: 4" 용접, M16)를 분리 저장할 수 있도록 spec 컬럼 추가.
DB ALTER 필요: ALTER TABLE consumable_items ADD COLUMN spec VARCHAR(200) DEFAULT NULL AFTER item_name;

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

system1-factory/web/pages/admin/purchase-analysis.html

@@ -108,6 +108,6 @@
         </div>
     </div>
     <script src="/static/js/tkfb-core.js?v=2026031601"></script>
-    <script src="/static/js/purchase-analysis.js?v=2026031601"></script>
+    <script src="/static/js/purchase-analysis.js?v=2026031602"></script>
 </body>
 </html>