Review follow-up to the bandwidth/rps/producers fix. The nginx stub_status
parse moves into SystemInfo::nginxRequestCount(), so the requests field the
watchdog samples is tested against a real status body and an unreachable
one (no count, rps 0). The getStats() test now pins the whole array_replace
statement (a `+` would leave the bandwidth keys at 0), and the sampler test
checks that 120 s is in range by default. No behaviour change.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQHeypQpfAXTdCysmi7b6a
