Convert the 4 EQ persistence readers (device presets, matrix presets, device names, per-station presets) to per-entry tolerant parsing via the shared persistencia_tolerante helper, so one corrupt entry no longer discards every sibling preset. The principal-preset reader gains diagnostic logging on its existing fallback path. No degraded flag or quarantine here (unlike alarms/stations) since EQ writes are explicit-only and presets are trivially re-creatable.