v0.24.3

Changes

• Fix migration error caused by nodes having invalid auth keys
  #2412
• Pre auth keys belonging to a user are no longer deleted with the user
  #2396
• Pre auth keys that are used by a node can no longer be deleted
  #2396

Changelog

• ffe2f29 do not allow preauth keys to be deleted if assigned to node (#2396)
• 3b55dac hscontrol/db: add migration setting non existing pak on nodes to null (#2412)
• 1e2419b update changelog