fix(notify): openclaw CLI cold-start 7-10s 대비해 timeout 25s + 디버그 로그

발견: 첫 E2E 테스트에서 4 자매 중 하랑이만 notify 성공, 나머지 3 자매는
"openclaw timeout" 으로 실패. 직접 측정해 보니 narang LXC 의
`openclaw message send` 가 7.258s (gateway connect + auth cold start).
기존 8s timeout 이 빡빡해서 가끔 들어오고 가끔 죽었음.

수정:
- discord-notify.ts: timeoutMs 기본값 8000 → 25000ms. fire-and-forget
  호출이라 메인 파이프라인 latency 영향 없음.
- spawn.ts: notify.start 호출 결과를 명시적 로그로 남김 (성공/실패/error
  각각 가시화). 다음 디버깅을 빠르게.
- server.ts: invoke.start 로그에 notifyChannelId 표시.

검증: 파이프라인 01KNW0ADA5CBFBVGCRV7VN1YTF 에서 4 자매 모두 notify.start
ok:true 확인.

sister-agent/src/discord-notify.ts

@@ -41,12 +41,17 @@ export async function notifyDiscord(opts: {
     const child = spawn(bin, args, { stdio: ["ignore", "pipe", "pipe"] });
     let stderr = "";
     let settled = false;
+    // OpenClaw CLI cold-start (gateway connect + auth) can take 7-10s
+    // even on a healthy LXC. Use a generous timeout — this call is
+    // fire-and-forget from spawn.ts so a longer timer doesn't block the
+    // pipeline; it only matters if the openclaw process is genuinely
+    // stuck.
     const timer = setTimeout(() => {
       if (settled) return;
       settled = true;
       child.kill("SIGKILL");
       resolveFn({ ok: false, error: `openclaw timeout` });
-    }, opts.timeoutMs ?? 8000);
+    }, opts.timeoutMs ?? 25000);
 
     child.stderr.on("data", (b: Buffer) => (stderr += b.toString()));
     child.on("error", (err) => {

sister-agent/src/server.ts

@@ -76,6 +76,7 @@ const server = createServer(async (req, res) => {
       log("info", "invoke.start", {
         pipelineId: req2.pipelineId,
         stage: req2.stage,
+        notifyChannelId: req2.notifyChannelId || "(none)",
       });
 
       try {

sister-agent/src/spawn.ts

@@ -105,16 +105,48 @@ export async function executeInvocation(
 
   // Discord stage-start ping (best-effort, fire-and-forget)
   if (req.notifyChannelId) {
-    void notifyDiscord({
+    notifyDiscord({
       channelId: req.notifyChannelId,
       message: renderStageStart({
         agentName,
         stage: req.stage,
         taskTitle: req.task.title,
       }),
-    }).catch(() => {
-      /* swallow — discord notify must never break the pipeline */
-    });
+    })
+      .then((r) => {
+        console.log(
+          JSON.stringify({
+            ts: new Date().toISOString(),
+            level: r.ok ? "info" : "warn",
+            agent: agentName,
+            msg: "notify.start",
+            channel: req.notifyChannelId,
+            ok: r.ok,
+            error: r.error,
+          }),
+        );
+      })
+      .catch((err) => {
+        console.error(
+          JSON.stringify({
+            ts: new Date().toISOString(),
+            level: "error",
+            agent: agentName,
+            msg: "notify.start.threw",
+            error: err instanceof Error ? err.message : String(err),
+          }),
+        );
+      });
+  } else {
+    console.log(
+      JSON.stringify({
+        ts: new Date().toISOString(),
+        level: "info",
+        agent: agentName,
+        msg: "notify.skipped",
+        reason: "no notifyChannelId in invoke request",
+      }),
+    );
   }
 
   try {