Feature/sort fields store proto

[warmwaterkruik]

1. The struct FragmentGraph needs the json protobuf marshalling directive so Elasticsearch stores these protobuf message or else the /api/pb/viewer/list will fail
2. The resource.NewFields has a fieldMap map that has unsorted sub maps. But we need to preserve the order of the resource entries in fg.Fields.

[github-actions]

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[codecov]

Codecov Report

Merging #63 (d67249d) into master (8ba6a0a) will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #63      +/-   ##
==========================================
- Coverage   31.97%   31.94%   -0.04%     
==========================================
  Files         115      115              
  Lines       13629    13642      +13     
==========================================
  Hits         4358     4358              
- Misses       8998     9011      +13     
  Partials      273      273              

Flag	Coverage Δ
unittests	31.94% <0.00%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
hub3/ead/mets.go	28.95% <ø> (ø)
hub3/fragments/resource.go	25.83% <0.00%> (-0.22%)	⬇️
hub3/server/http/handlers/search.go	0.00% <0.00%> (ø)

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[kiivihal]

Can you update the changelog as well?

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

No Coverage information
0.0% Duplication