[IOCOM-1436] Services and Organizations random logos

[Vangaorth]

Short description

This PR adds random logos for services and organizations.

List of changes proposed in this pull request

• Two lists of services and organizations file logos have been added
• On both endpoints (static_contents/logos/services/service_id and static_contents/logos/organizations/organization_id), on the first time, logo image is picked randomly from related file list. Subsequent requests to the same resource return the same file
• Special services (SEND and CGN) requests always return their own logo
• Enriched message response includes the organization fiscal code (in order to support fallback on message home list)

How to test

Call both enpoints above and check that the same logo is returned for subsequent requests (apart from restarting the server instance). Check that both SEND and CGN always return their own logo

[Vangaorth]

@adelloste

[codecov]

Codecov Report

Attention: Patch coverage is 93.75000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 69.87%. Comparing base (d97d986) to head (4837312).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #381      +/-   ##
==========================================
+ Coverage   69.65%   69.87%   +0.21%     
==========================================
  Files         153      153              
  Lines        4845     4886      +41     
  Branches      555      583      +28     
==========================================
+ Hits         3375     3414      +39     
+ Misses       1469     1395      -74     
- Partials        1       77      +76     

Files	Coverage Δ
src/features/messages/services/messagesService.ts	58.01% <ø> (ø)
src/populate-persistence.ts	83.70% <100.00%> (+0.18%)	⬆️
src/utils/file.ts	48.07% <100.00%> (+6.77%)	⬆️
src/routers/services_metadata.ts	60.44% <92.50%> (+10.94%)	⬆️

... and 24 files with indirect coverage changes

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