Introduce the ref2vec-centroid module

[parkerduckworth]

What's being changed:

Review checklist

• [ ] Documentation has been updated, if necessary. Link to changed documentation:
• [ ] Chaos pipeline run or not necessary. Link to pipeline:
• [ ] All new code is covered by tests where it is reasonable.
• [ ] Performance tests have been run or not necessary.

[codecov[bot]]

Codecov Report

Base: 69.01% // Head: 69.08% // Increases project coverage by +0.06% :tada:

Coverage data is based on head (c1675fe) compared to base (1fdd6ff). Patch coverage: 75.97% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2205      +/-   ##
==========================================
+ Coverage   69.01%   69.08%   +0.06%     
==========================================
  Files         497      502       +5     
  Lines       40655    40782     +127     
==========================================
+ Hits        28059    28174     +115     
- Misses      10478    10482       +4     
- Partials     2118     2126       +8     

Flag	Coverage Δ
integration	70.29% <86.66%> (+0.01%)	:arrow_up:
unittests	69.08% <75.97%> (+0.06%)	:arrow_up:

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

Impacted Files	Coverage Δ
...ers/handlers/graphql/local/aggregate/properties.go	79.24% <ø> (ø)
adapters/handlers/rest/configure_api.go	0.00% <0.00%> (ø)
adapters/repos/db/index.go	68.69% <ø> (ø)
adapters/repos/db/repo.go	80.39% <ø> (ø)
adapters/repos/db/sorter/basic_comparators.go	97.92% <ø> (ø)
adapters/repos/db/sorter/comparable_creator.go	100.00% <ø> (ø)
adapters/repos/db/sorter/comparable_sorter.go	88.63% <ø> (ø)
...ters/repos/db/sorter/comparable_value_extractor.go	85.81% <ø> (ø)
adapters/repos/db/sorter/comparator.go	100.00% <ø> (ø)
adapters/repos/db/sorter/datatypes_helper.go	90.47% <ø> (ø)
... and 53 more

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[parkerduckworth]

Converting to draft, to protect this from being merged until after v1.15.1 release