refactor: Remove Token management and integrate Redis for authentication

- Deleted the Token model and its repository, transitioning to a Redis-based token management system.
- Updated the service layer to utilize Redis for token storage, enhancing performance and scalability.
- Refactored the container to remove TokenRepository and integrate the new token service.
- Cleaned up the Dockerfile and other files by removing unnecessary whitespace and comments.
- Enhanced error handling and logging for Redis initialization and usage.

internal/handler/swagger_test.go

@@ -0,0 +1,27 @@
+package handler
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+)
+
+// 仅验证降级路径（未初始化依赖时的响应）
+func TestHealthCheck_Degraded(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+	router.GET("/health", HealthCheck)
+
+	req := httptest.NewRequest(http.MethodGet, "/health", nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusServiceUnavailable {
+		t.Fatalf("expected 503 when dependencies missing, got %d", w.Code)
+	}
+}
+
+
+