chore(testdata): add Vitocal 300G sample data#645

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CFenner wants to merge 2 commits intoopenviess:masterfrom

Trebron24:patch-1

Commits on Oct 29, 2025

Create Viessmann CU401B G (Vitocal 300-G).json
Trebron24
authored

Commits on Nov 10, 2025

Merge branch 'master' into patch-1
Trebron24
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