Hotfix: Preload community and user for error report

[ArtOfCode-]

Admin error reports pages are currently taking ~20s to load on prod because we're hitting an N+1 query where we don't preload community. I've added this preload (and one for user because we also use that, although it doesn't seem to be causing an issue).

[Oaphi]

@ArtOfCode- I've fixed up the runtime error caused by preloading communities before error types are collected.
Other than that, LGTM, the N+1 query is gone with the PR applied.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.76%. Comparing base (e93eb4d) to head (23ccd78).
⚠️ Report is 4 commits behind head on develop.

Additional details and impacted files

Components	Coverage Δ
controllers	75.87% <100.00%> (+<0.01%)	⬆️
helpers	85.09% <ø> (ø)
jobs	66.88% <ø> (ø)
models	93.01% <ø> (ø)
tasks	61.11% <ø> (ø)

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