733dfe94da
- The filter-group registry holds groups weakly (the filter->group table is the only strong reference), sweeps dead entries amortised and counts only live shapes against the 4096 cap; filters past the cap are counted on the new meter otopcua.opcua.condition_events.filter_groups_unshared. - A group validates its where clause too (restored, never-validated filters evaluate like validated ones). - Test: value-equal filters cost one projection per locale set per report. Claude-Session: https://claude.ai/code/session_01GT67AD99zQQqpLCVm3p7xk