feat: update medical training case and auth modules

apps/case/models.py

@@ -183,3 +183,37 @@ class ScoringRule(BaseModel):
 
     def __str__(self):
         return f"{self.case.title} - {self.dimension}"
+
+
+class CaseExamItem(BaseModel):
+    """病例检查/检验项目表（与 consultation 库 case_exam_item 同构）"""
+    case = models.ForeignKey(
+        CaseBase, on_delete=models.CASCADE,
+        related_name='exam_items', db_column='case_id',
+        verbose_name='病例',
+    )
+    item_code = models.CharField('检查项目编码', max_length=64)
+    item_name = models.CharField('检查项目名称', max_length=128)
+    item_type = models.CharField('项目类型', max_length=32)
+    category = models.CharField('项目分类', max_length=64, blank=True, default='')
+    result_text = models.TextField('结果文本')
+    result_structured = models.JSONField('结构化结果', null=True, blank=True, default=None)
+    is_key = models.BooleanField('是否关键检查', default=False)
+    is_abnormal = models.BooleanField('是否异常', default=False)
+    score_weight = models.DecimalField('评分权重', max_digits=5, decimal_places=2, default=1.00)
+    display_order = models.IntegerField('展示顺序', default=0)
+
+    class Meta:
+        db_table = 'case_exam_item'
+        verbose_name = '病例检查项'
+        verbose_name_plural = '病例检查项'
+        ordering = ['display_order', 'id']
+        constraints = [
+            models.UniqueConstraint(
+                fields=['case', 'item_code'],
+                name='uk_case_exam_item_code',
+            ),
+        ]
+
+    def __str__(self):
+        return f"{self.case_id}:{self.item_code}"