Fix Unknown Fields

[PSchmiedmayer]

Fix Unknown Fields

♻️ Current situation & Problem

• The viewer crashes if there is no heart rate or other information available for an ECG.

⚙️ Release Notes

• Fix Unknown Fields

Code of Conduct & Contributing Guidelines

By submitting creating this pull request, you agree to follow our Code of Conduct and Contributing Guidelines:

• I agree to follow the Code of Conduct and Contributing Guidelines.

[codecov]

Codecov Report

Attention: Patch coverage is 92.50000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 73.23%. Comparing base (96136ad) to head (8e2d53d).
Report is 1 commits behind head on main.

Files	Patch %	Lines
PAWS/ECGRecordings/ECGModule.swift	93.34%	2 Missing ⚠️
PAWS/ECGRecordings/ECGRecording.swift	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #78      +/-   ##
==========================================
- Coverage   74.28%   73.23%   -1.05%     
==========================================
  Files          39       39              
  Lines        1415     1434      +19     
==========================================
- Hits         1051     1050       -1     
- Misses        364      384      +20     

Files	Coverage Δ
PAWS/PAWSStandard.swift	64.78% <ø> (ø)
PAWS/Study Information/EnrollmentGroup.swift	97.06% <ø> (ø)
PAWS/ECGRecordings/ECGRecording.swift	97.73% <90.00%> (ø)
PAWS/ECGRecordings/ECGModule.swift	68.97% <93.34%> (-7.66%)	⬇️

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