[ux] Add metadata changes to sample history

[StephenHulme]

Allows tracking changes made to sample metadata

Changes proposed in this pull request

• Add new SampleMetadataEvent created with updated_sample_metadata!
  • Changes are stored as a json dictionary in the events table
• Make rendering of history pages and events more consistent across models
• Show timestamps in event rendering
• Render a SampleMetadataEvent using a dedicated diff partition
• Refactor SamplesController#update

Before:

After:

Edit:

Event created:

Sample manifest updated:

Instructions for Reviewers

• NOTE: merges into [dev] Pull accessioning out of samples #5615

[All PRs] - Confirm PR template filled
[Feature Branches] - Review code
[Production Merges to main]
    - Check story numbers included
    - Check for debug code
    - Check version

[codecov]

Codecov Report

❌ Patch coverage is 88.63636% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.25%. Comparing base (7dacd95) to head (d5a46e1).
⚠️ Report is 14 commits behind head on develop.

Files with missing lines	Patch %	Lines
app/controllers/samples_controller.rb	75.00%	4 Missing ⚠️
app/helpers/histories_helper.rb	88.88%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5617      +/-   ##
===========================================
+ Coverage    87.22%   87.25%   +0.02%     
===========================================
  Files         1461     1463       +2     
  Lines        33022    33056      +34     
  Branches      3475     3481       +6     
===========================================
+ Hits         28805    28842      +37     
+ Misses        4196     4193       -3     
  Partials        21       21              

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[BenTopping]

Looks good to me, nice quality of life improvement 👍
N.B haven't pulled down and tested altered views.