Features
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* Subtitle LoadFont element presence (SMPTE 429-2 8.4.1)
* Atmos Essence UL check
* Multi CPL package completeness check
* Naming Convention parsing always included in DCP Probe (with default value if parsing failed)
* Naming Convention check related to PackageType field
* EIDR CPL Metadata extraction
* Empty user text fields warning (CPL, PKL, AM)
Fixes
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* Errors when checking Subtitles without LoadFont element
Changes
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* Better diagnostic messages for checks