core/dutydb: add support for DutySyncContribution

[xenowits]

Adds support for DutySyncContribution.

category: feature
ticket: #1270

[codecov]

Codecov Report

Base: 53.20% // Head: 53.58% // Increases project coverage by +0.37% 🎉

Coverage data is based on head (13fa161) compared to base (741c6d0).
Patch coverage: 79.31% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1364      +/-   ##
==========================================
+ Coverage   53.20%   53.58%   +0.37%     
==========================================
  Files         142      142              
  Lines       17400    17478      +78     
==========================================
+ Hits         9258     9365     +107     
+ Misses       6838     6803      -35     
- Partials     1304     1310       +6     

Impacted Files	Coverage Δ
core/interfaces.go	0.00% <ø> (ø)
core/unsigneddata.go	46.97% <0.00%> (-0.45%)	⬇️
core/dutydb/memory.go	68.59% <81.17%> (+2.20%)	⬆️
dkg/transport.go	53.70% <0.00%> (-12.97%)	⬇️
app/vmock.go	73.79% <0.00%> (ø)
core/scheduler/scheduler.go	73.77% <0.00%> (+0.49%)	⬆️
core/leadercast/transport.go	76.33% <0.00%> (+1.18%)	⬆️
core/priority/prioritiser.go	63.73% <0.00%> (+2.07%)	⬆️
core/qbft/qbft.go	81.54% <0.00%> (+9.87%)	⬆️

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[corverroos]

LGTM