fix: log warnings instead of swallowing errors

- GetAllFilesInPath: log.Printf when file fetch or dir recursion fails
- integration_test: use strings.SplitN for owner/repo parsing (idiomatic)

Addresses GPT review findings #1, #2.

integration_test.go

@@ -6,6 +6,7 @@ import (
 	"context"
 	"os"
 	"strconv"
+	"strings"
 	"testing"
 
 	"gitea.weiker.me/rodin/review-bot/gitea"
@@ -43,14 +44,11 @@ func TestIntegration_FullReviewFlow(t *testing.T) {
 	}
 
 	// Parse owner/repo
-	owner, repoName := "", ""
-	for i, c := range giteaRepo {
-		if c == '/' {
-			owner = giteaRepo[:i]
-			repoName = giteaRepo[i+1:]
-			break
-		}
+	parts := strings.SplitN(giteaRepo, "/", 2)
+	if len(parts) != 2 {
+		t.Fatalf("Invalid repo format %q", giteaRepo)
 	}
+	owner, repoName := parts[0], parts[1]
 	if owner == "" || repoName == "" {
 		t.Fatalf("Invalid repo format %q", giteaRepo)
 	}