feat: add indices to speed up filtering and search

Author: mariajgrimaldi

openedx_authz/migrations/0008_roleassignmentaudit.py

@@ -68,6 +68,10 @@ class Migration(migrations.Migration):
                 "verbose_name": "Role Assignment Audit",
                 "verbose_name_plural": "Role Assignment Audits",
                 "ordering": ["-timestamp"],
+                "indexes": [
+                    models.Index(fields=["subject"], name="role_audit_subject_idx"),
+                    models.Index(fields=["scope"], name="role_audit_scope_idx"),
+                ],
             },
         ),
     ]

openedx_authz/models/core.py

@@ -297,6 +297,10 @@ class Meta:
         verbose_name = "Role Assignment Audit"
         verbose_name_plural = "Role Assignment Audits"
         ordering = ["-timestamp"]
+        indexes = [
+            models.Index(fields=["subject"], name="role_audit_subject_idx"),
+            models.Index(fields=["scope"], name="role_audit_scope_idx"),
+        ]
 
     @property
     def subject_display(self) -> str: