main:删除 Grafana 仪表板配置文件

更新内容：
- 移除 `dashboard.json` 文件，清理不再需要的 Grafana 仪表板配置。
- 简化项目目录结构，删除多余的监控配置以优化维护。

src/functional_scaffold/main.py

@@ -9,6 +9,7 @@ import time
 from .api import router
 from .config import settings
 from .core.logging import setup_logging
+from .core.tracing import generate_request_id, set_request_id, get_request_id
 from .core.metrics_unified import (
     get_metrics_manager,
     incr,
@@ -20,7 +21,11 @@ from .core.metrics_unified import (
 from .core.job_manager import get_job_manager, shutdown_job_manager
 
 # 设置日志
-setup_logging(level=settings.log_level, format_type=settings.log_format)
+setup_logging(
+    level=settings.log_level,
+    format_type=settings.log_format,
+    file_path=settings.log_file_path if settings.log_file_enabled else None,
+)
 logger = logging.getLogger(__name__)
 
 # 创建 FastAPI 应用
@@ -47,6 +52,10 @@ app.add_middleware(
 @app.middleware("http")
 async def log_requests(request: Request, call_next):
     """记录所有HTTP请求"""
+    # 从请求头获取或生成 request_id
+    request_id = request.headers.get("x-request-id") or generate_request_id()
+    set_request_id(request_id)
+
     logger.info(f"Request: {request.method} {request.url.path}")
     response = await call_next(request)
     logger.info(f"Response: {response.status_code}")