Initial code movement before getting into larger refactor. The goal is to refactor the stream store so that it can comply with multiple different writers and readers beyond just the details.Details struct. This will allow us to use the stream store to ingest large lists of errors fault items without burdening the backup manifest.
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#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🧹 Tech Debt/Cleanup
#### Issue(s)
* #2708
#### Test Plan
- [x] ⚡ Unit test
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