feat: 添加监控路由和相关功能，更新依赖项以支持新特性，增强服务监控能力

workflow_service/database/api.py

@@ -254,3 +254,21 @@ async def get_running_workflow_runs() -> List[dict]:
         runs = result.scalars().all()
 
         return [run.to_dict() for run in runs]
+
+
+async def get_workflow_runs_recent(start_time: datetime, end_time: datetime) -> List[dict]:
+    """获取指定时间范围内的最近工作流运行记录"""
+    async with AsyncSessionLocal() as session:
+        stmt = (
+            select(WorkflowRun)
+            .where(
+                WorkflowRun.created_at >= start_time,
+                WorkflowRun.created_at <= end_time
+            )
+            .order_by(WorkflowRun.created_at.desc())
+        )
+
+        result = await session.execute(stmt)
+        runs = result.scalars().all()
+
+        return [run.to_dict() for run in runs]