Adds empty-server auto-stop to the reconciler. When Idle.AutoStopEnabled
is true and the RCON player tally is zero for EmptySecondsBeforeStop seconds,
the operator flips desiredState to Stopped, which triggers the normal
graceful-shutdown path.
- Add EmptySince status field to track empty duration
- Clear EmptySince on stop and when players return
- Reuse existing RCON probe's player count (zero extra network cost)
- 4 new test cases covering timestamp, timeout, player-join reset, and
disabled-by-default
StartupSpec.HealthHTTPPort/Path switch pod readiness from plain-TCP to an HTTP GET for RCON-less loaders (LOOHP/Limbo) that report 'started' only after the first tick. User servers now default FallbackServer to the login gate, never the lobby, so a stopped/starting backend keeps authentication in front of a fresh connection.
Wire the fourth mandated §23 metric to a real producer. The histogram
spans two reconcile passes, so anchor and observation must persist in
status:
- Add status.startRequestedAt, set once on the first Starting reconcile
of a start attempt and cleared on Stopped so the next start re-anchors.
- Observe felis_start_duration_seconds exactly when readiness is first
reached (ReadySignalAt - StartRequestedAt), guarded so a server that
reaches ready without a Starting pass records nothing.
- Mirror the field into the deepcopy and the structural CRD schema so the
apiserver does not prune it on patchStatus round-trips.
- Promote prometheus/client_golang and client_model to direct deps now
that the operator and its tests import them.
Tests drive a step clock through Starting -> Running asserting the exact
observed duration, and through Running -> Stopped asserting the metric is
observed once and the anchor clears.
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