Add service registry endpoints

[cortadocodes]

Contents (#50)

New features

• Add endpoint for getting/registering service revisions

Operations

• Use octue/check-semantic-version action
• Use latest pull request description action
• Use latest Codecov action
• Fix default argument in workflow

Dependencies

• Add icecream to dev dependencies

Testing

• Make test package structure mirror package structure
• Test that only one revision of a service can be the default

Style

• Fix pre-commit checks
• Improve import spacing

[codecov-commenter]

Codecov Report

Merging #50 (b0aa3bd) into main (a426e55) will increase coverage by 2.10%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
+ Coverage   49.19%   51.30%   +2.10%     
==========================================
  Files          41       44       +3     
  Lines         811      842      +31     
==========================================
+ Hits          399      432      +33     
+ Misses        412      410       -2     

Impacted Files	Coverage Δ
django_twined/consumers/analysis.py	0.00% <ø> (ø)
django_twined/consumers/analysis_log.py	0.00% <ø> (ø)
django_twined/consumers/service.py	0.00% <ø> (ø)
django_twined/fields.py	88.23% <ø> (ø)
...ngo_twined/management/commands/sync_data_stores.py	0.00% <ø> (ø)
django_twined/messages.py	0.00% <ø> (ø)
django_twined/migrations/0001_initial.py	100.00% <ø> (ø)
...ed/migrations/0006_service_revisions_and_events.py	100.00% <ø> (ø)
django_twined/models/datastores.py	42.57% <ø> (ø)
...ango_twined/models/querysets/datastore_queryset.py	20.21% <ø> (ø)
... and 8 more

[thclark]

A number of suggestions made!

[thclark]

A few more comments

[thclark]

Discussion on the is_default column plus a couple of notes