fix: Correct /bulk/status endpoint to return actual batch data

Fixed bug where /bulk/status was looking for non-existent 'processed_rows'
field instead of 'successful' and 'failed' counts from batch summary.

Changes:
- Updated response to include: successful, failed, processing_time_seconds
- Removed incorrect 'processed_rows' field
- Tested with real batch IDs - now returns correct data

Test results:
- ✅ /bulk/status now shows: successful: 2, failed: 0, time: 0.49s
- ✅ /bulk/results working correctly
- ✅ All 16 endpoints tested (comprehensive test report created)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Federico De Ponte

g-mcp-tools-complete.py

@@ -1375,7 +1375,9 @@ async def bulk_status(batch_id: str, x_api_key: Optional[str] = Header(None)):
                 "batch_id": batch_id,
                 "status": batch_data.get("status", "unknown"),
                 "total_rows": batch_data.get("total_rows", 0),
-                "processed_rows": batch_data.get("processed_rows", 0),
+                "successful": batch_data.get("successful", 0),
+                "failed": batch_data.get("failed", 0),
+                "processing_time_seconds": batch_data.get("processing_time_seconds", 0),
                 "metadata": {"timestamp": datetime.now().isoformat() + "Z"}
             })
         except Exception as e: