refactor(modules): 拆分多模块工程并收口common基础模块

common-agent-observability/src/main/java/com/bruce/observability/controller/ObservabilityTraceController.java

@@ -0,0 +1,27 @@
+package com.bruce.observability.controller;
+
+import com.bruce.common.domain.model.RequestResult;
+import com.bruce.observability.vo.ObservabilityTraceVO;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+/**
+ * 运行观测控制器先提供占位查询接口，
+ * 后续在 observability 模块完善聚合服务实现。
+ */
+@RestController
+@RequestMapping("/api/observability")
+public class ObservabilityTraceController {
+
+    @GetMapping("/trace")
+    public RequestResult<ObservabilityTraceVO> trace(@RequestParam("requestId") String requestId) {
+        ObservabilityTraceVO vo = new ObservabilityTraceVO();
+        vo.setRequestId(requestId);
+        vo.setStepSummaries(List.of());
+        return RequestResult.success(vo);
+    }
+}

common-agent-observability/src/main/java/com/bruce/observability/vo/ObservabilityTraceVO.java

@@ -0,0 +1,31 @@
+package com.bruce.observability.vo;
+
+import lombok.Data;
+
+import java.math.BigDecimal;
+import java.util.List;
+
+/**
+ * requestId 级别的运行追踪聚合返回对象。
+ */
+@Data
+public class ObservabilityTraceVO {
+
+    private String requestId;
+
+    private String workflowStatus;
+
+    private String sessionStatus;
+
+    private Integer workflowStepCount;
+
+    private Integer messageCount;
+
+    private Integer modelCallCount;
+
+    private Integer totalDurationMs;
+
+    private BigDecimal estimatedCost;
+
+    private List<String> stepSummaries;
+}