main:更新 Grafana 仪表板查询条件

变更内容：
- 在日志仪表板查询中增加 `$request_id` 条件以优化日志筛选。
- 修改多处查询表达式，支持按请求 ID 过滤日志记录。
- 提升仪表板的可用性和查询精度。

monitoring/grafana/dashboards/logs-dashboard.json

@@ -51,7 +51,7 @@
             "uid": "Loki"
           },
           "editorMode": "code",
-          "expr": "{job=\"functional-scaffold-app\"}",
+          "expr": "{job=\"functional-scaffold-app\"} |= \"$request_id\"",
           "queryType": "range",
           "refId": "A"
         }
@@ -139,7 +139,7 @@
             "uid": "Loki"
           },
           "editorMode": "code",
-          "expr": "sum by (level) (count_over_time({job=\"functional-scaffold-app\"}[1m]))",
+          "expr": "sum by (level) (count_over_time({job=\"functional-scaffold-app\"} |= \"$request_id\" [1m]))",
           "queryType": "range",
           "refId": "A"
         }
@@ -205,7 +205,7 @@
             "uid": "Loki"
           },
           "editorMode": "code",
-          "expr": "sum by (level) (count_over_time({job=\"functional-scaffold-app\"}[$__range]))",
+          "expr": "sum by (level) (count_over_time({job=\"functional-scaffold-app\"} |= \"$request_id\" [$__range]))",
           "queryType": "range",
           "refId": "A"
         }
@@ -242,7 +242,7 @@
             "uid": "Loki"
           },
           "editorMode": "code",
-          "expr": "{job=\"functional-scaffold-app\", level=\"ERROR\"}",
+          "expr": "{job=\"functional-scaffold-app\", level=\"ERROR\"} |= \"$request_id\"",
           "queryType": "range",
           "refId": "A"
         }