🚸(backend) display recording owners directly in admin list view

Show recording owner(s) directly in admin list interface to speed up
troubleshooting. Previously required clicking into each object to identify
owner. Handles multiple owners (rare) by displaying a default message.

src/backend/core/admin.py

@@ -126,6 +126,27 @@ class RecordingAdmin(admin.ModelAdmin):
 
     inlines = (RecordingAccessInline,)
     search_fields = ["status", "=id", "worker_id", "room__slug", "=room__id"]
-    list_display = ("id", "status", "room", "created_at", "worker_id")
+    list_display = ("id", "status", "room", "get_owner", "created_at", "worker_id")
     list_filter = ["status", "room", "created_at"]
     readonly_fields = ["id", "created_at", "updated_at"]
+
+    def get_queryset(self, request):
+        """Optimize queries by prefetching related access and user data to avoid N+1 queries."""
+        return super().get_queryset(request).prefetch_related("accesses__user")
+
+    def get_owner(self, obj):
+        """Return the owner of the recording for display in the admin list."""
+
+        owners = [
+            access
+            for access in obj.accesses.all()
+            if access.role == models.RoleChoices.OWNER
+        ]
+
+        if not owners:
+            return _("No owner")
+
+        if len(owners) > 1:
+            return _("Multiple owners")
+
+        return str(owners[0].user)