docs(faq): add diagram for request lifecycle

The textual description is great. A visual helps more people understand the various stations a request runs through.

Author: benkroeger

content/faq/request-lifecycle.md

@@ -94,3 +94,5 @@ In general, the request lifecycle looks like the following:
    - 9.2 controller
    - 9.3 global
 10. Server response
+
+![nest-request-flow](https://github.com/user-attachments/assets/863a9d5e-1625-41a9-98f5-e19d3f87132b)