Add missing translations for new sensors

[Disane87]

🎯 Description

Some of the new sensor names in the translations files might need updates or additions.

💡 Hints

• Translation files are in custom_components/spoolman/translations/
• Check de.json, en.json for completeness
• Compare with sensor names in custom_components/spoolman/sensors/ directory
• Look at how existing translations are structured

✅ Acceptance Criteria

• All new sensors have proper translations
• Translations are consistent across all language files
• JSON files are properly formatted
• No syntax errors in JSON

🚀 Getting Started

1. Fork the repository
2. Check translation files in custom_components/spoolman/translations/
3. Compare with sensor implementations
4. Add missing translations
5. Submit PR to dev branch

📚 Resources

• Home Assistant Translation Guidelines