Performance reports answered 'what were the averages' but never 'was my
infrastructure up' - the question a managed-service client reads a
monthly report for. Reports now carry an Availability summary derived
from the recorded resource change timeline (state_transition entries
keyed by the canonical unified ID):
- uptime percent over the observed portion of the window, outage count,
total downtime, and longest outage, rendered in the executive summary
with an explicit semantics note; fleet summaries gain a per-resource
Uptime column and CSV exports gain availability header lines
- absent/unknown spans are unobserved time: excluded from the uptime
math entirely and disclosed as coverage, never counted as downtime.
The journal records a registry absence for every monitor restart, so
treating gaps as outages would invent fleet-wide downtime every time
the operator restarts Pulse
- warning states count as up (the resource is reachable and serving);
the uptime label clamps rounding so any real downtime can never
display as a clean 100%
- resources with no timeline render no availability section at all
rather than a fabricated number
Verified live against a real 7-day window: uptime/outage/downtime
figures reconcile with the raw resource_changes journal.
