# What this PR does
Adds SSR push notification follow-ups (similar to
https://github.com/grafana/oncall/pull/2798)
## Which issue(s) this PR fixes
https://github.com/grafana/oncall/issues/2679
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# What this PR does
Add Slack follow-up messages for shift swap requests:
<img width="377" alt="Screenshot 2023-08-15 at 20 19 49"
src="https://github.com/grafana/oncall/assets/20116910/14053838-c8f2-49f6-81cd-383d3fbc061c">
## Which issue(s) this PR fixes
https://github.com/grafana/oncall/issues/2679
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# What this PR does
**Shift Swap Requests**
https://www.loom.com/share/860c3337b338412cbd2ac4024260f3e8?sid=3d91b558-b4de-4351-8b45-8a99b7302346
**Other**
- Drastically improve the typing in the `slack` Django app, and several
other models/functions that were consumed by logic within the `slack`
Django app (ex. setting `RelatedManager` type hints on various models)
https://www.loom.com/share/da6b9984519c48d59a45d3c93c08d7dc
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
