feat(purchase): 생산소모품 구매 관리 시스템 구현

tkuser: 업체(공급업체) CRUD + 소모품 마스터 CRUD (사진 업로드 포함)
tkfb: 구매신청 → 구매 처리 → 월간 분석/정산 전체 워크플로
설비(equipment) 분류 구매 시 자동 등록 + 실패 시 admin 알림

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

user-management/api/models/consumableItemModel.js

@@ -0,0 +1,56 @@
+const { getPool } = require('./userModel');
+
+// ===== 소모품 마스터 =====
+
+async function findAll({ category, search, is_active } = {}) {
+  const db = getPool();
+  let sql = 'SELECT * FROM consumable_items WHERE 1=1';
+  const params = [];
+  if (is_active !== undefined) { sql += ' AND is_active = ?'; params.push(is_active); }
+  if (category) { sql += ' AND category = ?'; params.push(category); }
+  if (search) { sql += ' AND (item_name LIKE ? OR maker LIKE ?)'; params.push(`%${search}%`, `%${search}%`); }
+  sql += ' ORDER BY category, item_name';
+  const [rows] = await db.query(sql, params);
+  return rows;
+}
+
+async function findById(id) {
+  const db = getPool();
+  const [rows] = await db.query('SELECT * FROM consumable_items WHERE item_id = ?', [id]);
+  return rows[0] || null;
+}
+
+async function create(data) {
+  const db = getPool();
+  const [result] = await db.query(
+    `INSERT INTO consumable_items (item_name, maker, category, base_price, unit, photo_path)
+     VALUES (?, ?, ?, ?, ?, ?)`,
+    [data.item_name, data.maker || null, data.category,
+     data.base_price || 0, data.unit || 'EA', data.photo_path || null]
+  );
+  return findById(result.insertId);
+}
+
+async function update(id, data) {
+  const db = getPool();
+  const fields = [];
+  const values = [];
+  if (data.item_name !== undefined) { fields.push('item_name = ?'); values.push(data.item_name); }
+  if (data.maker !== undefined) { fields.push('maker = ?'); values.push(data.maker || null); }
+  if (data.category !== undefined) { fields.push('category = ?'); values.push(data.category); }
+  if (data.base_price !== undefined) { fields.push('base_price = ?'); values.push(data.base_price); }
+  if (data.unit !== undefined) { fields.push('unit = ?'); values.push(data.unit || 'EA'); }
+  if (data.photo_path !== undefined) { fields.push('photo_path = ?'); values.push(data.photo_path || null); }
+  if (data.is_active !== undefined) { fields.push('is_active = ?'); values.push(data.is_active); }
+  if (fields.length === 0) return findById(id);
+  values.push(id);
+  await db.query(`UPDATE consumable_items SET ${fields.join(', ')} WHERE item_id = ?`, values);
+  return findById(id);
+}
+
+async function deactivate(id) {
+  const db = getPool();
+  await db.query('UPDATE consumable_items SET is_active = FALSE WHERE item_id = ?', [id]);
+}
+
+module.exports = { findAll, findById, create, update, deactivate };