Healthchecks

Improvements

• Rewrite the docker/fetchstatus.py script to reduce Docker container CPU use (#1071)
• Update Dockerfile to use Python 3.13
• Update CustomHeaderMiddleware to normalize email addresses to lower case (#1074)
• Add data migration to convert existing user account emails to lower case
• Update email alerts to mention failure reason (#1069)
• De-emphasize the unsubscribe link in email notifications
• In the checks list, move the “Add Check” button to the top of the page
• Implement filtering by status in the checks list page
• Increase ntfy.sh topic max length to 64
• Implement support for path in SITE_ROOT, e.g. SITE_ROOT=http://example.org/hc (#1091)

Bug Fixes

• Improve recipient address validation in the smtp listener (#1077)