feat: Introduce message composer uploads persistence

[dougfabris]

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CORE-1956

[dionisio-bot]

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[codecov]

Codecov Report

❌ Patch coverage is 60.71429% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.20%. Comparing base (9760d84) to head (47ae23c).
⚠️ Report is 95 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #40111      +/-   ##
===========================================
- Coverage    70.20%   70.20%   -0.01%     
===========================================
  Files         3278     3278              
  Lines       116605   116633      +28     
  Branches     20723    20663      -60     
===========================================
+ Hits         81859    81877      +18     
- Misses       31444    31480      +36     
+ Partials      3302     3276      -26     

Flag	Coverage Δ
e2e	59.71% <60.71%> (+0.05%)	⬆️
e2e-api	46.64% <ø> (-0.81%)	⬇️
unit	71.01% <ø> (-0.01%)	⬇️

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