feat: Add retrieving log entries

[sandrask]

Implement retrieving log entries to log-entries store. Initially it is only used to test stored log entries.

Closes #1256

Signed-off-by: Sandra Vrtikapa sandra.vrtikapa@securekey.com

[codecov]

Codecov Report

Merging #1257 (a4fe2d9) into main (1b9365a) will decrease coverage by 0.05%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##             main    #1257      +/-   ##
==========================================
- Coverage   87.95%   87.89%   -0.06%     
==========================================
  Files         173      173              
  Lines       17364    17397      +33     
==========================================
+ Hits        15272    15291      +19     
- Misses       1332     1343      +11     
- Partials      760      763       +3     

Impacted Files	Coverage Δ
pkg/store/logentry/store.go	89.04% <85.71%> (-5.84%)	⬇️
...pub/service/inbox/httpsubscriber/httpsubscriber.go	88.88% <0.00%> (-8.89%)	⬇️
cmd/orb-server/startcmd/start.go	68.24% <0.00%> (-0.45%)	⬇️
cmd/orb-server/startcmd/params.go	81.78% <0.00%> (-0.13%)	⬇️
...g/activitypub/service/vct/logmonitoring/monitor.go	96.59% <0.00%> (-0.08%)	⬇️
pkg/activitypub/service/service.go	94.11% <0.00%> (+0.08%)	⬆️
pkg/activitypub/service/inbox/inbox.go	91.05% <0.00%> (+0.45%)	⬆️
...ivitypub/service/vct/proofmonitoring/monitoring.go	80.55% <0.00%> (+2.77%)	⬆️

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