Storage used by Loop is not purged regularly

[marionbarker]

Describe the bug
The size of the Documents & Data store maintained by Loop grows over time. This was reported first in zulipchat: #general > Loop using 3GB of storage with some people reporting several GB of data

• @ps2 inspected the code and said that the purging of old logs, which should be limit the duration to localCacheDuration, is not performed except when someone issues a Loop Report
• @elnjensen reported his storage (> 2GB) prevented him from issuing a Loop Report
• Refer to LoopKit PR for the proposed solution

Attach an Issue Report
N/A

To Reproduce
Steps to reproduce the behavior:

1. Go to iPhone Settings
2. Click on General
3. Scroll down to iPhone Storage
4. Tap on Loop and examine app size and Documents & Data size

Expected behavior
The Documents & Data size should be well under 1 GB.

Screenshots
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Phone
n/a

Loop Version

• all versions since Loop 3 was released
• current released version is 3.8.0

CGM
n/a

Pump
n/a

Additional context
n/a

[marionbarker]

This issue is fixed with LoopKit PR 581. But keeping the issue open until the next release gets this fix into main.