Show more detail about the error when pusher registration fails.

[bmarty]

Will give more details in this dialog:

[github-actions]

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 83.24%. Comparing base (800d6f0) to head (8cc7f1c).
Report is 6 commits behind head on develop.

Files with missing lines	Patch %	Lines
...io/element/android/appnav/loggedin/LoggedInView.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #4081   +/-   ##
========================================
  Coverage    83.24%   83.24%           
========================================
  Files         1881     1881           
  Lines        48983    48983           
  Branches      5743     5743           
========================================
  Hits         40777    40777           
  Misses        6143     6143           
  Partials      2063     2063           

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