fix(meyer): preserve request counts after status write failures

apps/pac-service/src/integrations/meyer/scheduler.ts

@@ -74,7 +74,9 @@ export async function runMeyerTick(config: MeyerConfig, sourceFor: (c: MeyerConf
       retryFailed += result.failed + result.analysisFailed;
     } catch {
       retryFailed++;
-      await pending.write(key, { ...value, attempts: value.attempts + 1,
+      // collector 可能已持久化请求次数后才在写运行摘要时失败；不能回写旧次数。
+      const retained = await pending.read<PendingImage>(key) ?? value;
+      await pending.write(key, { ...retained, attempts: retained.attempts + 1,
         nextRetryAt: new Date(now + 3600000).toISOString() });
     }
   }

apps/pac-service/tests/meyer-analysis-retry.spec.ts

@@ -115,4 +115,24 @@ describe('Meyer analysis retry policy', () => {
     expect(s.source.symptom).not.toHaveBeenCalled();
     expect(s.sink.apply).toHaveBeenCalledTimes(1);
   });
+  test('a later status-write failure cannot roll back durable analysis attempts in scheduler recovery', async () => {
+    const s = setup(); s.config.maxAnalysisAttempts = 1;
+    await s.store.write('cursor', { through: chinaTime(created + 2 * 3600000) });
+    await s.pending.write(s.key, { scope: s.config.scopes[0], image: meyerImage(), attempts: 1,
+      analysisAttempts: 0, nextRetryAt: new Date(created).toISOString() });
+    const write = s.store.write.bind(s.store);
+    const spy = jest.spyOn(s.store, 'write').mockImplementation(async (key, value) => {
+      if (key === 'last-run') throw Error('status file unavailable');
+      return write(key, value);
+    });
+    const result = await runMeyerTick(s.config, () => s.source, s.store, codes, s.sink, created + 2 * 3600000);
+    spy.mockRestore();
+    expect(result.retryFailed).toBe(1);
+    expect(await s.pending.read(s.key)).toMatchObject({ analysisAttempts: 1, autoRetry: false, reason: 'analysis_exhausted' });
+    expect(s.source.symptom).toHaveBeenCalledTimes(1);
+    await s.store.write('cursor', { through: chinaTime(created + 4 * 3600000) });
+    const factory = jest.fn(() => s.source);
+    await runMeyerTick(s.config, factory, s.store, codes, s.sink, created + 4 * 3600000);
+    expect(factory).not.toHaveBeenCalled();
+  });
 });