b25920dfc0
Log whenever we: * Commit an AUM which was previously soft-deleted (which we don't expect to happen in practice, and may indicate an issue with our sync code) * Purge AUMs during a Compact operation. * Successfully commit AUMs as part of a bootstrap or sync operation. All three logs mention `tka` for easy of discoverability. Updates tailscale/corp#39455 Change-Id: I2b07bb0ef075877f40ec34b80bb668be59e1cdc3 Signed-off-by: Alex Chan <alexc@tailscale.com>