General improvements

[Oaphi]

• picks some of the access control predicate changes from User moderator tools user interface redesign #2063 to reduce review complexity + the sooner these changes are on develop, the better;
• fixes loading of rails_performance in setups that only use the database.yml config without setting RAILS_URL;

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80.78%. Comparing base (0d818d4) to head (ee9b3ed).

Files with missing lines	Patch %	Lines
app/controllers/users_controller.rb	0.00%	1 Missing ⚠️

Additional details and impacted files

Components	Coverage Δ
controllers	76.43% <80.00%> (+0.05%)	⬆️
helpers	85.47% <ø> (ø)
jobs	77.43% <ø> (ø)
models	93.12% <ø> (ø)
tasks	61.11% <ø> (ø)

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