fix: allow appmetadata to be undefined when validating name when data model is uploaded

[standeren]

Description

allow appMetadata to be undefined when validating name when data model is uploaded

Related Issue(s)

• #{issue number}

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)
• Relevant automated test added (if you find this hard, leave it and we'll help out)

[nkylstad]

🙌 Great work!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.50%. Comparing base (3ab9086) to head (54e9131).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #14236   +/-   ##
=======================================
  Coverage   95.50%   95.50%           
=======================================
  Files        1817     1817           
  Lines       23652    23652           
  Branches     2735     2735           
=======================================
  Hits        22590    22590           
  Misses        808      808           
  Partials      254      254           

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[nkylstad]

Testet OK i dev - opplasting av datamodell i datamodell repo fungerer nå som forventet.