… overwrite tests

- TestDashboardEventsToggle.m: 5 new methods (Phase 1017)
  testTagRegistryEventStoreRoundTrip, testTagRegistryEventStoreEmptyDefault,
  testTagRegistryEventStoreOverwrite, testTagRegistryClearResetsEventStore,
  testTagRegistryEventStoreSetEmptyClears
- Add deleteIfExists local helper for temp file cleanup
- test_dashboard_events_toggle.m: 5 Octave parity test blocks (tests 9-13)
  matching MATLAB names for grep-verified parity
- All 13 tests green in Octave (8 existing + 5 new)

…entStore()

- Insert 3-line registry-default fallback after NV-pair for-loop
- Fallback only runs when no explicit 'EventStore' NV-pair was provided
- Explicit per-instance store always wins (fallback gated on isempty)
- Falls back to [] when registry default unset (pre-1017 behavior preserved)
- Dual-key stamping at 3 sites (lines 738-741, 762-765, 877-879) untouched

…ission tests

- testMonitorTagRegistryDefaultFallback: verifies constructor uses registry default
- testMonitorTagExplicitOverridesRegistry: verifies explicit NV-pair wins
- testMonitorTagDualKeyEmission: regression-protects dual-key stamp at 3 sites
- All three tests added to both MATLAB suite and Octave flat test file
- 16 total Octave tests pass (0 failures)

…th registry-default fallback

- FastSense.renderEventLayer_: append TagRegistry.getEventStore() tail after bound-tag loop
- FastSenseWidget.render: use esForward local var resolved from registry default before inner FastSense forwarding
- Both sites: explicit per-instance store wins (unchanged), registry only consulted when slot is empty
- Second render path (rerender method in FastSenseWidget) also updated

…idget registry-default fallback

- testRegistryDefaultFastSense: verifies renderEventLayer_ uses TagRegistry.getEventStore() when bound tag's EventStore is empty
- testRegistryDefaultFastSenseWidget: verifies FastSenseWidget forwards registry-default store to inner FastSense
- testFastSenseWidgetExplicitWinsOverRegistry: explicit EventStore NV-pair wins over registry default
- Octave parity: Tests 17-19 in test_dashboard_events_toggle.m (all 19 pass)
- Added closeIfValid helper to TestDashboardEventsToggle.m

…lineWidget + TableWidget

- EventTimelineWidget.resolveEvents: public; uses local esObj resolved from
  obj.EventStoreObj then TagRegistry.getEventStore() (Phase 1017, no obj mutation)
- New private helper eventStoreToStructsFrom_(esObj) avoids re-entrancy risk
  (RESEARCH Pitfall 6) — body is verbatim copy of eventStoreToStructs with esObj arg
- TableWidget refresh events branch: condition narrowed to strcmp(Mode,'events');
  local esObj resolves explicit slot then registry default (Phase 1017)

…eWidget registry-default fallback

- testRegistryDefaultEventTimeline: no EventStoreObj -> registry default resolves
- testRegistryDefaultTableWidget: Mode=events, no EventStoreObj -> refresh via registry
- testEventTimelineExplicitWinsOverRegistry: explicit store wins over registry default
- Also fix pre-existing Octave incompatibility: replace contains() with strfind in TableWidget

- Add TagRegistry.setEventStore(store) after EventStore construction
- Drop 'EventStore', store NV-pair from all four MonitorTag constructors
- MonitorTag instances now pick up EventStore via registry-default fallback

- Drop 'EventStoreObj', ctx.store NV-pair from EventTimelineWidget call
- Fix misleading comment claiming FastSense 'auto-discovers EventStore
  from any bound MonitorTag' — replaced with accurate description of the
  registry-default fallback and dual-key MonitorTag event emission
- Update function header comment to reflect registry-default approach

…t pattern

- Add TagRegistry.clear(); EventBinding.clear(); at top to prevent singleton pollution
- Add TagRegistry.setEventStore(es) once after EventStore construction
- Register both SensorTags and MonitorTags via TagRegistry.register()
- Drop 'EventStore', es NV-pairs from both MonitorTag constructors
- Drop 'EventStore', es NV-pairs from both addWidget calls
- Retain 'ShowEventMarkers', true on both widgets (explicit feature toggle)