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.

gitea/client.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"log"
 	"net/http"
 	"strings"
 )
@@ -224,7 +225,8 @@ func (c *Client) GetAllFilesInPath(ctx context.Context, owner, repo, path string
 		case "file":
 			content, err := c.GetFileContent(ctx, owner, repo, entry.Path)
 			if err != nil {
-				continue // Skip files we can't read
+				log.Printf("Warning: could not fetch file %s: %v", entry.Path, err)
+			continue
 			}
 			results[entry.Path] = content
 		case "dir":