[WIP] Position for mapping rules

[macejmic]

What this PR does / why we need it:

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Which issue(s) this PR fixes

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Verification steps

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Special notes for your reviewer:

[codecov]

Codecov Report

Merging #554 into feature/sorting-mapping-rules will increase coverage by <.01%.
The diff coverage is 98.03%.

@@                        Coverage Diff                        @@
##           feature/sorting-mapping-rules     #554      +/-   ##
=================================================================
+ Coverage                          92.72%   92.72%   +<.01%     
=================================================================
  Files                               2353     2353              
  Lines                              76216    76262      +46     
=================================================================
+ Hits                               70669    70714      +45     
- Misses                              5547     5548       +1

Impacted Files	Coverage Δ
test/workers/delete_plain_object_worker_test.rb	100% <100%> (ø)	⬆️
app/models/proxy_rule.rb	98.3% <100%> (+0.05%)	⬆️
test/integration/api/integration_test.rb	100% <100%> (ø)	⬆️
app/controllers/api/integrations_controller.rb	74.81% <88.88%> (+0.79%)	⬆️

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