ashmrtn 957a33b6d9
Finish wiring up Exchange preview backups (#4660)
This completes the wiring for Exchange preview backups. A few notable
points:
* Adds new config substruct(?) for limits on items/data
* Adds "reasonable defaults" (very small) for Exchange data categories
* Adds "important" and "skip" containers for Exchange data categories

All the above can be tweaked as we determine what values work best

Manually tested
1. regular backup
2. preview backup
3. regular backup

Verified that no merge base is used for the preview backup and the
merge base made in (1) is used for the backup in (3)

This feature is not exposed via CLI

May be easiest to review by commit

---

#### Does this PR need a docs update or release note?

- [ ]  Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [x]  No

#### Type of change

- [x] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

#### Issues

Merge after:
* #4657
* #4607

#### Test Plan

- [x] 💪 Manual
- [x]  Unit test
- [ ] 💚 E2E
2023-11-17 01:46:17 +00:00
..
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2023-08-18 22:45:21 +00:00
2023-08-16 06:02:37 +00:00