fix(web-probe): configure observe alert thresholds from yaml (#726)

Co-authored-by: Codex <codex@noreply.local>

scripts/src/hwlab-node-help.ts

@@ -90,7 +90,7 @@ export function hwlabNodeWebProbeHelp(): Record<string, unknown> {
       observe: "Start, inspect, control, stop, collect, and analyze a pure-client long-running Workbench observer on the target host. The observer runs a control page plus a passive observer page in a shared-auth browser context, receives commands through stateDir/commands files, writes JSONL artifacts, and does not expose any inbound service API.",
     },
     notes: [
-      "The default probe URL and browser proxy mode come from config/hwlab-node-lanes.yaml webProbe; pass --url only when intentionally overriding the YAML-selected origin.",
+      "The default probe URL, browser proxy mode, and observe/analyze alert thresholds come from config/hwlab-node-lanes.yaml webProbe; pass --url only when intentionally overriding the YAML-selected origin.",
       "Prefer --script-file for reusable probes; stdin heredocs remain supported for one-off probes.",
       "Issue-ready evidence is available under issueEvidence and summary.issueEvidence; full script report is persisted under probe.reportPath with a SHA-256 fingerprint.",
       "observe sampling is passive by default: it records DOM summaries and natural page request/response/requestfailed events with observerInitiated=false; it does not actively fetch Workbench APIs, reload, switch sessions, route/intercept, or call repair helpers.",