taylanbakircioglu 4620eb4a4a feat: server-side event histogram for Events Timeline visualization ...

Replace client-side event bucketing (limited to 50 paginated events) with
server-side ClickHouse aggregation using toStartOfInterval(). This fixes
the timeline showing a single bar despite multiple analysis runs.

Backend:
- Add query_event_histogram() to timeseries-query with epoch-aligned
  bucket generation, capability_checks security filter, and count()-based
  empty table detection
- Add GET /events/histogram endpoints through all layers (timeseries-query,
  backend repository, service, router with analysis_id validation)

Frontend:
- Add getEventHistogram RTK Query hook with EventHistogram cache tag
- Replace client-side timelineData bucketing with server-side histogram
- Stacked bar colors (sorted by eventTypeConfig order for consistency)
- Clickable bars for time-range filtering (zoom-in)
- Loading skeleton, smart time labels (DD MMM HH:mm for multi-day),
  full event type legend filtered by presence, total event count in header
- event_types filter synced with histogram query

Documentation:
- Update CURRENT_ARCHITECTURE, DATA_SOURCES, ARCHITECTURE_DETAILED,
  services/README, and OpenAPI spec with /events/histogram endpoint

Made-with: Cursor

2026-04-06 15:47:49 +03:00

..

openapi-spec.yaml

feat: server-side event histogram for Events Timeline visualization

2026-04-06 15:47:49 +03:00