fix: load pipeline stats in syncFileStatus and handle missing pipeline data

Problem:
- syncFileStatus() doesn't load pipeline progress data
- Files stuck in 'processing' without percentage display
- pollPipelineProgress() not started when pipeline data missing

Solution:
1. Add loadPipelineStats() call in syncFileStatus() for processing files
2. Start pollPipelineProgress() even when pipeline data is missing
3. Ensure progress bar always has data to display

Impact:
- Progress bar now shows percentage during deep scan
- Files no longer stuck in 'processing' state indefinitely
- Better handling of edge cases when API data is missing

Related: Core team needs to verify get_pipeline_stats API accuracy

src/store.ts

@@ -886,6 +886,10 @@ export async function syncFileStatus(fileUuid: string): Promise<any> {
           delete fileProgressCache.value[fileUuid]
         }
         f.status = newStatus
+        
+        if (newStatus === 'processing') {
+          await loadPipelineStats(fileUuid, true)
+        }
       }
     }