infra: add logging wrapping

Resolves issues with gcp cloud logging quirks such as field names

go/internal/middleware/auth.go

@@ -2,10 +2,11 @@ package middleware
 
 import (
 	"context"
-	"log/slog"
 	"net/http"
 	"strings"
 
+	"github.com/flowy-live/llink/internal/utils/flog"
+
 	"github.com/flowy-live/llink/internal/auth"
 )
 
@@ -62,7 +63,7 @@ func Auth(authSvc auth.AuthService) func(http.Handler) http.Handler {
 			}
 
 			if err := authSvc.ExtendSession(r.Context(), token); err != nil {
-				slog.Warn("failed to extend session", "error", err)
+				flog.Warn("failed to extend session", "error", err)
 			}
 
 			ctx := WithEmail(r.Context(), session.Email)