An open macrostep span row held in OpentelemetryStatifier.SpanTable
between the macrostep :start event that creates it and the :stop
event whose span_ref matches.
started_at is the monotonic_time the span was opened with -
SpanTable.fetch_innermost_open_span/2 orders a session's open spans
by it, and recomputing it from the span ctx is not possible through
the API. (The sweep turned out not to need an age: it keys on session
process liveness, via the table's :session_pid rows.)
Summary
Types
@type t() :: %OpentelemetryStatifier.SpanEntry{ session_id: String.t(), span_ctx: OpenTelemetry.span_ctx(), started_at: integer(), trigger: atom() }