* Add check to verify the vault state for rotation is not obviously desynced (empty)
* Add unit test for key rotation guardrail
* Move de-synced vault detection to validators
* Add tests
## Type of change
<!-- (mark with an `X`) -->
```
- [ ] Bug fix
- [ ] New feature development
- [x] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other
```
## Objective
<!--Describe what the purpose of this PR is. For example: what bug you're fixing or what new feature you're adding-->
Previous PR: #3434
Adds ciphers and folders to the new key rotation.
## Code changes
<!--Explain the changes you've made to each file or major component. This should help the reviewer understand your changes-->
<!--Also refer to any related changes or PRs in other repositories-->
* **file.ext:** Description of what was changed and why
## Before you submit
- Please check for formatting errors (`dotnet format --verify-no-changes`) (required)
- If making database changes - make sure you also update Entity Framework queries and/or migrations
- Please add **unit tests** where it makes sense to do so (encouraged but not required)
- If this change requires a **documentation update** - notify the documentation team
- If this change has particular **deployment requirements** - notify the DevOps team
