fraud: implement fraud service

[vgonkivs]

Implemented fraud service on top of fraud interface.

[codecov-commenter]

Codecov Report

Merging #811 (f644123) into main (aee88c2) will increase coverage by 0.55%.
The diff coverage is 43.54%.

@@            Coverage Diff             @@
##             main     #811      +/-   ##
==========================================
+ Coverage   53.03%   53.58%   +0.55%     
==========================================
  Files         117      122       +5     
  Lines        6760     6957     +197     
==========================================
+ Hits         3585     3728     +143     
- Misses       2810     2844      +34     
- Partials      365      385      +20     

Impacted Files	Coverage Δ
fraud/bad_encoding.go	43.75% <0.00%> (+9.30%)	⬆️
fraud/subscription.go	21.42% <21.42%> (ø)
fraud/service.go	48.48% <48.48%> (ø)
fraud/topic.go	60.00% <60.00%> (ø)
service/share/full_availability.go	52.38% <0.00%> (-41.37%)	⬇️
service/share/light_availability.go	76.19% <0.00%> (-7.15%)	⬇️
ipld/retriever.go	83.45% <0.00%> (-4.32%)	⬇️
service/rpc/server.go	79.06% <0.00%> (-0.94%)	⬇️
node/rpc/component.go	100.00% <0.00%> (ø)
service/share/testing.go	100.00% <0.00%> (ø)
... and 9 more

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[renaynay]

So good 🚀

[Wondertan]

Nice. We should add a few simple units here and we are fully read to go

[vgonkivs]

[vgonkivs]

Failed test is a known issue. It will be resolved within #815