feat(api): add Grafana time range endpoint for scores

- Add /api/v2/server/scores/{server}/{mode} endpoint
- Support time range queries with from/to parameters
- Return data in Grafana table format for visualization
- Fix routing pattern to handle IP addresses correctly
- Add comprehensive parameter validation and error handling

server/history.go

@@ -456,3 +456,4 @@ func setHistoryCacheControl(c echo.Context, history *logscores.LogScoreHistory)
 		}
 	}
 }
+