[BUG] 'ERROR' views displayed when out of storage.

[Nathan13888]

When the server is out of storage, Redis could no longer flush it's cache resulting in the error. However when the &hit=false flag is included, Redis newer writes to disk so a view count is still shown.

Proposed Mitigations

Detect this edge-case:

• Be able to monitor an "unexpected" badge periodically
• Redis should be able to detect if it runs out of space
• When the error is detected, there should be a public page that posts the issue on a public page.

Prevent this edge-case:

• Disk space should be reserved for Redis
• If there is an error, the last known view should be shown

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