feat: enhance observability metrics collection and reporting

- Updated BuildSnapshot function to include OpenResty metrics.
- Enhanced BuildTrafficReport to utilize managed OpenResty metrics.
- Introduced new functions for parsing access logs in both JSON and combined formats.
- Added tests for traffic report generation from combined access logs.
- Implemented local observability metrics collection from OpenResty.
- Created Lua scripts for OpenResty to gather observability data.
- Updated configuration documentation to include new observability port and settings.
- Added support for OpenResty observability in the server configuration.

atsf_server/web/features/nodes/components/node-detail-page.tsx

@@ -1350,7 +1350,6 @@ export function NodeDetailPage({ nodeId }: { nodeId: string }) {
               </p>
               {node.latest_apply_checksum ? (
                 <div className="space-y-1 text-sm text-[var(--foreground-secondary)]">
-                  <p>目标 Checksum：{node.latest_apply_checksum}</p>
                   <p>支持文件：{node.latest_support_file_count}</p>
                 </div>
               ) : null}