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

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

scripts/src/hwlab-node-lanes.ts

@@ -125,6 +125,16 @@ export type HwlabRuntimeWebProbeOriginSpec = HwlabRuntimeWebProbeServiceOriginSp
 export interface HwlabRuntimeWebProbeSpec {
   readonly browserProxyMode?: "auto" | "direct";
   readonly defaultOrigin?: HwlabRuntimeWebProbeOriginSpec;
+  readonly alertThresholds?: HwlabRuntimeWebProbeAlertThresholdsSpec;
+}
+
+export interface HwlabRuntimeWebProbeAlertThresholdsSpec {
+  readonly sameOriginApiSlowMs: number;
+  readonly partialApiSlowMs: number;
+  readonly longLivedStreamOpenSlowMs: number;
+  readonly visibleLoadingSlowMs: number;
+  readonly turnTimingSampleSlackSeconds: number;
+  readonly sessionRailFallbackRatio: number;
 }
 
 export interface HwlabRuntimeBuildkitSpec {
@@ -692,6 +702,21 @@ function webProbeConfig(value: unknown, path: string): HwlabRuntimeWebProbeSpec
   return {
     ...(browserProxyMode === undefined ? {} : { browserProxyMode }),
     ...(raw.defaultOrigin === undefined ? {} : { defaultOrigin: webProbeOriginConfig(raw.defaultOrigin, `${path}.defaultOrigin`) }),
+    ...(raw.alertThresholds === undefined ? {} : { alertThresholds: webProbeAlertThresholdsConfig(raw.alertThresholds, `${path}.alertThresholds`) }),
+  };
+}
+
+function webProbeAlertThresholdsConfig(value: unknown, path: string): HwlabRuntimeWebProbeAlertThresholdsSpec {
+  const raw = asRecord(value, path);
+  const sessionRailFallbackRatio = positiveNumberField(raw, "sessionRailFallbackRatio", path);
+  if (sessionRailFallbackRatio > 1) throw new Error(`${path}.sessionRailFallbackRatio must be <= 1`);
+  return {
+    sameOriginApiSlowMs: positiveNumberField(raw, "sameOriginApiSlowMs", path),
+    partialApiSlowMs: positiveNumberField(raw, "partialApiSlowMs", path),
+    longLivedStreamOpenSlowMs: positiveNumberField(raw, "longLivedStreamOpenSlowMs", path),
+    visibleLoadingSlowMs: positiveNumberField(raw, "visibleLoadingSlowMs", path),
+    turnTimingSampleSlackSeconds: positiveNumberField(raw, "turnTimingSampleSlackSeconds", path),
+    sessionRailFallbackRatio,
   };
 }