For example, `autoclean-once failedforwards` would count every non-failed forwards
as "uncleaned".
This is both technically correct and completely useless.
Changelog-Fixed: JSON-RPC: `autoclean-once` returns "uncleaned" number reflecting number of candidates which were too new to be cleaned, not all records we didn't delete.
Fixes: https://github.com/ElementsProject/lightning/issues/8632
Reported-by: @grubles and several other sharp-eyed users.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>