v0.0.21

Tested against DBOS 2.19.0 — see tested_dbos_version in GET /version and dbos-argus --version. Other DBOS versions may still work; the in-app connection indicator surfaces any schema mismatches.

Added

• SQLite backend support via the new ArgusDB adapter split. Point
  ARGUS_DATABASE_URL at sqlite+aiosqlite:///path/to/argus.db and
  the entire stack (REST + realtime) works against the DBOS app's
  SQLite store. CI matrix runs the test suite against both backends.
• Realtime (WebSocket) layer at /ws replaces per-page polling. One
  multiplexed socket carries every page's subscriptions; server-side
  pollers gate heavier snapshots behind a cheap cursor query and shut
  down when the last subscriber disconnects. Channels: health,
  stats, stats.timeseries, workflows, workflow, schedules,
  notifications — each emits the same JSON shape as its REST
  counterpart, which remains authoritative for curl/debug. Cursor
  queries are implemented per-dialect on ArgusDB so the layer works
  unchanged on both Postgres and SQLite. Configurable via
  ARGUS_REALTIME_ENABLED, ARGUS_REALTIME_INTERVAL_MS,
  ARGUS_REALTIME_HEALTH_INTERVAL_MS, and
  ARGUS_REALTIME_MAX_SUBS_PER_CONN.
• Live workflow detail page: subscribing to workflow with {id}
  re-snapshots every tick so steps appear as they complete.

Changed

• Connection indicator now reflects WebSocket health (with a 1Hz
  poll surfacing disconnects as a sticky fetchError) instead of
  per-page setInterval(5000) /healthz fetches. While diagnostics
  report issues (e.g. dbos schema absent), the indicator re-polls
  /api/sql-diagnostics every 5s so it converges automatically once
  the DBOS app provisions its tables — no hard refresh needed.
• Hub suppresses update broadcasts when a fresh snapshot is
  byte-identical to the cached one. Cursor-less channels (workflow,
  health) re-snapshot every tick; the dedupe keeps the wire quiet
  and prevents xyflow edge-dash animations on the workflow detail
  page from restarting on every poll.

Fixed

• Workflow flow renders the container header (name + ID) for
  freshly-spawned workflows that have no steps yet — ELK was
  collapsing empty containers to ~0×0, leaving only the status
  badge visible until the first step landed.