feat(performance): 批量执行合并报告实现（数据持久化 + 聚合算法 + API）

- PerformanceBatchExecution / PerformanceProjectReport 模型实现（表已建立）
- _aggregate_task_results 聚合算法: 求和/重算错误率与TPS/加权平均响应时间/
  取极值/加权近似分位数(p50/p90/p95/p99)/聚合标准差重算, 排除失败任务
- 批量执行完成后自动生成合并报告并持久化, 返回 report_id
- GET /api/performance/reports 按 project_id/batch_id 查询, ?latest=1 取最新
- ProjectReportResponse/ProjectReportListResponse/TaskSummaryItem schema,
  BatchRunResponse 增加 report_id 字段
Co-Authored-By: Claude <noreply@anthropic.com>

backend/app/routers/performance.py

@@ -41,6 +41,8 @@ from app.schemas.performance import (
     PerformanceProjectStatsResponse,
     BatchRunRequest,
     BatchRunResponse,
+    ProjectReportResponse,
+    ProjectReportListResponse,
 )
 from app.services.performance_service import PerformanceService
 from app.utils.curl_parser import parse_curl
@@ -527,6 +529,7 @@ async def batch_run_tasks(
         message=f"批量执行完成: {result['success_count']} 成功, {result['fail_count']} 失败",
         batch_id=result["batch_id"],
         task_count=result["total"],
+        report_id=result.get("report_id"),
     )
 
 
@@ -554,4 +557,52 @@ async def run_project_all(
         message=f"项目执行完成: {result['success_count']} 成功, {result['fail_count']} 失败",
         batch_id=result["batch_id"],
         task_count=result["total"],
+        report_id=result.get("report_id"),
     )
+
+
+# ==================== 合并报告 ====================
+
+
+@router.get("/projects/{project_id}/report", response_model=ProjectReportResponse)
+async def get_project_report(
+    project_id: str,
+    service: PerformanceService = Depends(get_perf_service),
+):
+    """
+    获取项目最新合并报告
+
+    返回该项目最近一次批量执行生成的合并报告。
+    """
+    report = await service.get_project_report(project_id)
+    if not report:
+        raise HTTPException(status_code=404, detail="该项目暂无合并报告")
+    return report
+
+
+@router.get("/batch-reports/{batch_id}", response_model=ProjectReportResponse)
+async def get_batch_report(
+    batch_id: str,
+    service: PerformanceService = Depends(get_perf_service),
+):
+    """
+    按批次ID获取合并报告
+    """
+    report = await service.get_batch_report(batch_id)
+    if not report:
+        raise HTTPException(status_code=404, detail="合并报告不存在")
+    return report
+
+
+@router.get("/projects/{project_id}/reports", response_model=ProjectReportListResponse)
+async def get_project_reports(
+    project_id: str,
+    page: int = Query(1, ge=1, description="页码"),
+    page_size: int = Query(20, ge=1, le=100, description="每页数量"),
+    service: PerformanceService = Depends(get_perf_service),
+):
+    """
+    获取项目历史合并报告列表
+    """
+    result = await service.list_project_reports(project_id, page, page_size)
+    return ProjectReportListResponse(**result)
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backend/app/schemas/performance.py

@@ -460,5 +460,71 @@ class BatchRunResponse(BaseModel):
     message: str
     batch_id: str
     task_count: int
+    report_id: Optional[str] = Field(None, description="合并报告ID（批量执行完成后生成）")
+
+    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)
+
+
+# ==================== 合并报告 ====================
+
+class TaskSummaryItem(BaseModel):
+    """合并报告中的任务明细项"""
+    task_id: str = Field(..., description="任务ID")
+    task_name: str = Field("", description="任务名称")
+    status: str = Field("", description="任务状态")
+    total_requests: int = Field(0, description="请求数")
+    success_count: int = Field(0, description="成功数")
+    fail_count: int = Field(0, description="失败数")
+    avg_response_time: float = Field(0.0, description="平均响应时间(ms)")
+    actual_tps: float = Field(0.0, description="实际TPS")
+    error_rate: float = Field(0.0, description="错误率")
+
+    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)
+
+
+class ProjectReportSummary(BaseModel):
+    """合并报告聚合指标摘要"""
+    total_requests: int = 0
+    success_count: int = 0
+    fail_count: int = 0
+    error_rate: float = 0.0
+    actual_tps: float = 0.0
+    peak_tps: float = 0.0
+    avg_response_time: float = 0.0
+    min_response_time: float = 0.0
+    max_response_time: float = 0.0
+    p50_response_time: float = 0.0
+    p90_response_time: float = 0.0
+    p95_response_time: float = 0.0
+    p99_response_time: float = 0.0
+    std_dev: float = 0.0
+    apdex: float = 1.0
+    status_2xx: int = Field(0, alias="status2xx")
+    status_3xx: int = Field(0, alias="status3xx")
+    status_4xx: int = Field(0, alias="status4xx")
+    status_5xx: int = Field(0, alias="status5xx")
+    total_sent_bytes: int = 0
+    total_received_bytes: int = 0
+    duration_actual: float = 0.0
+
+    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)
+
+
+class ProjectReportResponse(BaseModel):
+    """合并报告完整响应"""
+    id: str
+    project_id: str
+    batch_id: Optional[str] = None
+    created_at: Optional[str] = None
+    summary: ProjectReportSummary
+    task_summaries: List[TaskSummaryItem] = []
+
+    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)
+
+
+class ProjectReportListResponse(BaseModel):
+    """合并报告列表响应"""
+    total: int
+    items: List[ProjectReportResponse]
 
     model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)
\ No newline at end of file