feat: validate metadata dates

https://issues.unige.ch/browse/AOU-289

added 5 commits

• fee56bc1...1943bfb9 - 4 commits from branch master
• ecb34614 - feat: validate metadata dates

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added 3 commits

• ecb34614...b7dd2b2a - 2 commits from branch master
• 926e14d3 - feat: validate metadata dates

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added 2 commits

• fee56bc1 - feat: validate metadata dates
• 4aebe5d2 - fix: fix dates in metadataextractor test

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added 8 commits

• 4aebe5d2...b7dd2b2a - 6 commits from branch master
• 626a2076 - feat: validate metadata dates
• 3ad2a580 - fix: fix dates in metadataextractor test

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merged