feat(harness): improve trace fallback and reasoning audit

src/test/java/com/superbiz/agent/config/HarnessChatConfigurationTest.java

@@ -2,6 +2,7 @@ package com.superbiz.agent.config;
 
 import com.superbiz.agent.harness.core.DiagnosisHarnessCore;
 import com.superbiz.agent.harness.audit.ToolInvocationAuditSink;
+import com.superbiz.agent.harness.audit.DiagnosisTraceRecorder;
 import com.superbiz.agent.harness.application.persistence.ChatRunStore;
 import com.superbiz.agent.harness.tool.contract.MysqlToolRequest;
 import com.superbiz.agent.harness.tool.mysql.MysqlSqlValidator;
@@ -13,6 +14,7 @@ import com.superbiz.agent.service.KnowledgeEvidencePostProcessor;
 import com.superbiz.agent.service.KnowledgeQueryTransformer;
 import com.superbiz.agent.service.LookupResultAssembler;
 import com.superbiz.agent.repository.AgentStepRepository;
+import com.superbiz.agent.repository.AgentReasoningAuditRepository;
 import org.springframework.ai.chat.model.ChatModel;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.data.redis.core.RedisTemplate;
@@ -75,7 +77,10 @@ class HarnessChatConfigurationTest {
                 .withBean(KnowledgeContextPacker.class, () -> mock(KnowledgeContextPacker.class))
                 .withBean(LookupResultAssembler.class, () -> mock(LookupResultAssembler.class))
                 .withBean(ToolInvocationAuditSink.class, ToolInvocationAuditSink::noop)
+                .withBean(DiagnosisTraceRecorder.class, DiagnosisTraceRecorder::noop)
                 .withBean(AgentStepRepository.class, () -> mock(AgentStepRepository.class))
+                .withBean(AgentReasoningAuditRepository.class,
+                        () -> mock(AgentReasoningAuditRepository.class))
                 .withBean(ChatRunStore.class, () -> mock(ChatRunStore.class))
                 .withBean(MysqlToolProperties.class, MysqlToolProperties::new)
                 .run(context -> {