Y25-286 - Add accessioning status quo diagram

[StephenHulme]

Provides additional information for #4879

Changes proposed in this pull request

• Adds accessioning diagrams
  • Overall
  • Users
  • Function calls
• Ignores generated accessioning PNG and SVG files

Instructions for Reviewers

[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

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.97%. Comparing base (dc0da6b) to head (04e2914).
⚠️ Report is 16 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #5319   +/-   ##
========================================
  Coverage    86.96%   86.97%           
========================================
  Files         1443     1443           
  Lines        32013    32013           
  Branches      3359     3359           
========================================
+ Hits         27841    27842    +1     
+ Misses        4159     4158    -1     
  Partials        13       13           

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