docs: 2026-05-28 ops coverage audit + WAL-G monitor fix
- homelab-architecture.md: new "Ops coverage matrix" + "Recent ops debt
cleared" + "Still open" sections. Verifies log aggregation (8/8 hosts),
Postgres archiving (CT 113 + Immich), Backrest (16 paths exist, all 3
plans have hooks), Diun, config-to-git, offsite sync, Gotify apps,
timers and crons across the fleet.
- backrest.md: 16:00 false-positive postmortem (CT 103 had no SSH access
to CT 113; 2>/dev/null hid the host-key error). Documented retry loop +
SSH key deployment. Refreshed CT 113 DB list (added owui, miniflux;
noted litellm decommissioned but DB retained).
fkrebs
9cbd02e3ff