feat: 优化问问微信检索性能与分析交互

- 补充 Worker、WCDB、sender、IPC、序列化时间账
- 增加 Agent 增量覆盖统计和重复检索停止条件
- 补充性能与交互回归测试

src/main/knowledge/knowledge-worker-host.ts

@@ -169,8 +169,12 @@ export class KnowledgeWorkerHost {
         workerBootMs,
         dispatchMs,
         workerSqlMs: result.timings.totalMs,
+        workerExecutionMs: result.timings.workerExecutionMs ?? result.timings.totalMs,
+        workerQueueMs: transport.workerQueueMs ?? 0,
         responseSerializeMs: transport.responseSerializeMs,
         responseTransferMs,
+        serializationMs: transport.responseSerializeMs,
+        ipcMs: workerBootMs + dispatchMs + responseTransferMs,
         workerIpcMs: workerBootMs + dispatchMs + responseTransferMs
       }
     }