v57

🔖 concrexit v57

• Fix vacancy serializer thumbnails (#3897)
• Regenerates the list of announcements for API (#3876)
• Optimize summaries page with queryable properties (#3890)
• Do small optimization on Album.cover() (#3889)
• Remove Career Central link (#3882)
• Fix lockfile (#3894)
• Fix mailing list issue (#3872)
• Fix signatures (#3868)
• Fix company name and logo not showing up in vacancies API (#3867)

📦️ Dependency updates

• Bump django from 5.1.2 to 5.1.5 (#3886)