fix: 诊断运行脚本杀过一次后续跑不再重杀，三条检查按 kill.json 和杀时账本做（任务书 18 第三块）

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

eval/diagnosis/run.ts

@@ -122,12 +122,8 @@ function start(path: string | null) {
 const sampler = setInterval(sample, 5000);
 sampler.unref();
 let active = start(config);
-let killEvidence: {
-  run: string;
-  cell: string;
-  round: number;
-  killSeq: number;
-} | null = null;
+// 杀过一次以后（kill.json 已写），模型服务出错等停下再续跑时不再杀；最后的三条检查照 kill.json 和杀时账本做。
+const killPending = kill && !existsSync(join(out, "kill.json"));
 try {
   await waitForLedger(studyDir, active.child);
   let watching = watchTimeline(
@@ -135,7 +131,7 @@ try {
     active.child,
     join(out, "timeline.jsonl"),
   );
-  if (kill) {
+  if (killPending) {
     // 盯住账本：第一个用途为 diagnosis 的运行确认启动之后、结果落账之前杀控制进程（照 eval/forward/run.ts 的 kill 做法）。
     let hit = false;
     while (active.child.exitCode === null && active.child.signalCode === null) {
@@ -189,12 +185,6 @@ try {
             join(out, "container-before-resume.json"),
             inspect(container),
           );
-          killEvidence = {
-            run,
-            cell: plan.content.object!,
-            round: plan.content.round,
-            killSeq: atKill.at(-1)!.seq,
-          };
           active = start(null);
           watching = watchTimeline(
             studyDir,
@@ -262,7 +252,12 @@ try {
   jsonFile(join(out, "accounts.json"), accounts);
 
   // 杀进程的三条检查（任务书 17 第 3.1 节）：①恢复按容器名接着等同一个容器、没有重跑；②只扣一次；③结果照常写入、结算和后续步骤走完。
-  if (killEvidence !== null) {
+  if (existsSync(join(out, "kill.json"))) {
+    const killSeq = (
+      JSON.parse(
+        readFileSync(join(out, "ledger-at-kill.json"), "utf8"),
+      ) as Array<{ seq: number }>
+    ).at(-1)!.seq;
     const evidence = JSON.parse(
       readFileSync(join(out, "kill.json"), "utf8"),
     ) as { run: string; cell: string; round: number; container: string };
@@ -305,7 +300,7 @@ try {
       );
     const report = {
       evidence,
-      killSeq: killEvidence.killSeq,
+      killSeq,
       snapshotMeaning: "杀前、杀后、恢复启动前；没有把快照当成恢复完成的证据",
       lifecycleChecks,
       checks: {
@@ -316,7 +311,7 @@ try {
         chargedOnce: target.starts.length === 1,
         resultSettledAndFinished:
           target.results.length === 1 &&
-          target.results[0]!.seq > killEvidence.killSeq &&
+          target.results[0]!.seq > killSeq &&
           settlement !== undefined &&
           settlement.run === evidence.run &&
           perExperimentRecorded &&