- Replace broken localsearch oneshot with proper miner daemon running as
  ldx on ldx's session bus (lingering enabled) so Samba Spotlight queries
  from macOS clients actually work
- Fix systemd-networkd-wait-online 2-min boot timeout (anyInterface=true)
- Add storage-tuning service to enforce mq-deadline on SAS HDDs and
  increase Mellanox ring buffers (1024→4096) at boot
- Simplify udev I/O scheduler rules to match by rotational attribute
  instead of hardcoded kernel device names
- Update TM dataset recordsize comments to reflect 1M (applied on pool)
- Fix deprecated linuxPackages_6_6.perf → perf

ZFS properties applied separately on skydick:
  com.sun:auto-snapshot=true on dick (was unset — no snapshots taken)
  com.sun:auto-snapshot=false on dick/users/ldx/timemachine
  recordsize=1M on dick/users/ldx/timemachine

Co-Authored-By: Claude Opus 4.6 <[email protected]>