feat(backend): add request id (#11666)

helpful for https://github.com/inventree/InvenTree/issues/9996

src/backend/InvenTree/InvenTree/logging.py

@@ -0,0 +1,17 @@
+"""Helpers for logging integrations."""
+
+from django.dispatch import receiver
+
+import structlog
+from django_structlog import signals
+
+
+@receiver(signals.update_failure_response)
+@receiver(signals.bind_extra_request_finished_metadata)
+def add_request_id_to_response(response, logger, **kwargs):
+    """Add the request ID to the response header, so that it can be traced through logs.
+
+    source: https://django-structlog.readthedocs.io/en/latest/how_tos.html#bind-request-id-to-response-s-header
+    """
+    context = structlog.contextvars.get_merged_contextvars(logger)
+    response['X-InvenTree-ReqId'] = context['request_id']

src/backend/InvenTree/InvenTree/urls.py

@@ -20,6 +20,7 @@ import build.api
 import common.api
 import company.api
 import importer.api
+import InvenTree.logging  # noqa: F401 - ensure logging handlers are registered
 import machine.api
 import order.api
 import part.api