Updated OUSD contract diagram

[naddison36]

Code Change Checklist

To be completed before internal review begins:

• The contract code is complete
• Executable deployment file
• Fork tests that test after the deployment file runs
• Unit tests *if needed
• The owner has done a full checklist review of the code + tests

Internal review:

• Two approvals by internal reviewers

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 39.07%. Comparing base (1bf1b14) to head (6973974).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2728      +/-   ##
==========================================
- Coverage   39.40%   39.07%   -0.33%     
==========================================
  Files         126      126              
  Lines        5789     5789              
  Branches     1537     1537              
==========================================
- Hits         2281     2262      -19     
- Misses       3506     3525      +19     
  Partials        2        2              

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