fix(app): Ensure panic recovery

[alexanderbez]

Changelog

Ensure panic recovery in application ProcessProposal handler.

[codecov[bot]]

Codecov Report

Attention: 13 lines in your changes are missing coverage. Please review.

Comparison is base (e696486) 63.44% compared to head (13c5335) 63.46%. Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1276      +/-   ##
==========================================
+ Coverage   63.44%   63.46%   +0.01%     
==========================================
  Files         257      257              
  Lines       16739    16756      +17     
==========================================
+ Hits        10620    10634      +14     
- Misses       5613     5615       +2     
- Partials      506      507       +1     

Files	Coverage Δ
app/upgrades.go	40.74% <ø> (ø)
app/app.go	76.96% <45.83%> (-0.90%)	:arrow_down:

... and 3 files with indirect coverage changes