feat:新增物料安全库存上限字段并支持仓库数量汇总报表

- mtm_material 新增 count_safe_upper(安全库存上限), count_safe 语义明确为下限
- 迁移 0065

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/mtm/migrations/0065_material_count_safe_upper_alter_material_count_safe.py

@@ -0,0 +1,23 @@
+# Generated by Django 4.2.27 on 2026-07-14 06:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mtm', '0064_process_clear_defect'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='material',
+            name='count_safe_upper',
+            field=models.DecimalField(blank=True, decimal_places=3, max_digits=14, null=True, verbose_name='安全库存上限'),
+        ),
+        migrations.AlterField(
+            model_name='material',
+            name='count_safe',
+            field=models.DecimalField(blank=True, decimal_places=3, max_digits=14, null=True, verbose_name='安全库存数(下限)'),
+        ),
+    ]

apps/mtm/models.py

@@ -98,7 +98,8 @@ class Material(CommonAModel):
     # count = models.DecimalField('总库存', max_digits=14, decimal_places=3, default=0)
     # count_mb = models.DecimalField('仓库库存', max_digits=14, decimal_places=3, default=0)
     # count_wm = models.DecimalField('车间库存', max_digits=14, decimal_places=3, default=0)
-    count_safe = models.DecimalField('安全库存数', max_digits=14, decimal_places=3, null=True, blank=True)
+    count_safe = models.DecimalField('安全库存数(下限)', max_digits=14, decimal_places=3, null=True, blank=True)
+    count_safe_upper = models.DecimalField('安全库存上限', max_digits=14, decimal_places=3, null=True, blank=True)
     week_esitimate_consume = models.DecimalField('周消耗预估', max_digits=14, decimal_places=3, null=True, blank=True)
     process = models.ForeignKey(
         Process, verbose_name='所用工序', on_delete=models.CASCADE, null=True, blank=True)