Epic: Email User Notifications

[apburnes]

### Tasks
- [ ] [WIP] Proposed Epic: Fix the queues	https://github.com/cloud-gov/pages-core/issues/4296 Proposed Epic: UX & Market Research	https://github.com/cloud-gov/pages-core/issues/4284 Proposed Epic: Product Analytics	https://github.com/cloud-gov/pages-core/issues/4283 Proposed Epic: BYOATO	https://github.com/cloud-gov/pages-core/issues/4329 Epic: Pages Redirect SCR	https://github.com/cloud-gov/internal-docs/issues/148 Epic: App User Notifications	https://github.com/cloud-gov/pages-core/issues/4255 Epic: Product Communications Maturity	https://github.com/cloud-gov/pages-core/issues/4253 Epic: Release Build Tasks	https://github.com/cloud-gov/pages-core/issues/4327