9.52Don't make every automated test end-to-end

Bad:

all tests:
Mobile API
↓ Process
↓ System
↓ Salesforce
↓ Billing
↓ ERP

Slow, brittle, hard to diagnose.

Better testing pyramid:

many:
MUnit/unit/component tests

many:
API contract tests

some:
integration tests against real Salesforce sandbox

fewer:
full end-to-end workflows

We'll formalize this in the MUnit/testing modules.