fix: refactor index_together to indexes for Django 5.2 support

lms/djangoapps/coursewarehistoryextended/migrations/0003_rename_studentmodulehistoryextended_student_module_student_module_idx.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.20 on 2025-05-15 03:30
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('coursewarehistoryextended', '0002_force_studentmodule_index'),
+    ]
+
+    operations = [
+        migrations.RenameIndex(
+            model_name='studentmodulehistoryextended',
+            new_name='student_module_idx',
+            old_fields=('student_module',),
+        ),
+    ]

lms/djangoapps/coursewarehistoryextended/models.py

@@ -33,7 +33,12 @@ class StudentModuleHistoryExtended(BaseStudentModuleHistory):
     class Meta:
         app_label = 'coursewarehistoryextended'
         get_latest_by = "created"
-        index_together = ['student_module']
+        indexes = [
+            models.Index(
+                fields=['student_module'],
+                name="student_module_idx"
+            ),
+        ]
 
     id = UnsignedBigIntAutoField(primary_key=True)  # pylint: disable=invalid-name