fix: correct import ordering for gci linter

- Reorder imports to fix gci linting issue
- Move external dependencies before internal packages

Author: d0ugal

internal/server/server.go

@@ -6,11 +6,12 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/gin-gonic/gin"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+
 	"ghcr-exporter/internal/config"
 	"ghcr-exporter/internal/metrics"
 	"ghcr-exporter/internal/version"
-	"github.com/gin-gonic/gin"
-	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
 
 type Server struct {
@@ -25,7 +26,7 @@ func New(cfg *config.Config, metricsRegistry *metrics.Registry) *Server {
 	if cfg.Logging.Level != "debug" {
 		gin.SetMode(gin.ReleaseMode)
 	}
-	
+
 	router := gin.New()
 	router.Use(gin.Recovery())