feat: dbcontext abstraction via dependency

backend/cmd/main.go

@@ -24,6 +24,7 @@ import (
 	"easywish/config"
 	docs "easywish/docs"
 	"easywish/internal/controllers"
+	"easywish/internal/database"
 	"easywish/internal/logger"
 	"easywish/internal/routes"
 	"easywish/internal/services"
@@ -43,6 +44,7 @@ func main() {
 			logger.NewLogger,
 			gin.Default,
 		),
+		database.Module,
 		services.Module,
 		controllers.Module,
 		routes.Module,