Eliot has an overview page with an architecture diagram:

https://mozilla-eliot.readthedocs.io/en/latest/overview.html#architecture

We have the same diagram (actually, it's slightly different) here in Confluence:

https://mozilla-hub.atlassian.net/wiki/spaces/SRE/pages/178192647/Symbolication+aka+Eliot#%F0%9F%8F%9B%EF%B8%8F-Architecture-Diagram

Both of them and possibly things around them should get updated to reflect the changes in Eliot since we put it in GCP.