notes-240229

• Containerized the whole app. Everything now runs in Kubernetes.
• Upgraded to Django 5.
• Started pruning the audit log. The pruning time frame depends on the importance of the data. Nothing is pruned earlier than two years.
• Started opening absence links in modals from everywhere.
• Started showing vacation planning warnings when people are not planning enough vacations.
• Changed the content type of the annual working time ZIP so that it isn't destroyed during transmission by proxies etc.
• Stopped crashing when users try to determine a currency exchange rate for the future (which isn't possible).
• Added a new defined search to the invoice list which allows showing open invoices sorted by their due date.
• Added a warning when users create invoices with negative subtotals.
• Added a warning when users try creating invoices with invoice dates in the far future.
• Stopped attaching PDFs to the autodunning mail
• Added the functionality to copy logged cost entries
• Actually allowed moving costs between projects
• Allowed adding and editing absences directly from the annual working time report