regression: fix app installation

[d-gubert]

Proposed changes (including videos or screenshots)

The changes introduced here ended up modifying the object reference sent to the create function that inserts a new app document in the database, but that function counted on modifying the object it received to assign the inserted id.

This caused routines that relied on the inserted id of the app storage record to stop working - namely private api endpoint registration

Issue(s)

Steps to test or reproduce

Further comments

CONN-625

[dionisio-bot]

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Latest commit: 42926bf

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[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.12%. Comparing base (6f70529) to head (42926bf).
Report is 1 commits behind head on release-7.6.0.

Additional details and impacted files

@@                Coverage Diff                @@
##           release-7.6.0   #35888      +/-   ##
=================================================
+ Coverage          57.14%   61.12%   +3.97%     
=================================================
  Files               2445     3153     +708     
  Lines              63915    74549   +10634     
  Branches           14126    16667    +2541     
=================================================
+ Hits               36525    45566    +9041     
- Misses             25011    25884     +873     
- Partials            2379     3099     +720     

Flag	Coverage Δ
e2e	57.85% <ø> (+11.58%)	⬆️
unit	74.98% <ø> (ø)

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