Deploy 2025-01-15

[zrobert7]

Deploy changelog

• Update wagtail 6.3
• Update django version to 4.2.18

Pre-deploy Checklist

• Verify basic CMS functionality (saving drafts, publishing changes) across content types
• Verify directory filters (country/topic/language) work as expected
• Verify directory search works as expected
• Verify contact form submission works as expected (functionality may be limited in staging)
• Verify that the directory scan result page in the admin interface loads as expected
• Verify that the API at /api/v1/directory/ returns directory entries and scan results as expected

Additional QA notes

Anything else that might be needed to be QA'd specific to this particular deploy.