fix trackerhandle should be sequential

packs screens can get all messed up otherwise

This function was being limited elsewhere (since it was 'working'), and recent updates have unlocked actual async it seems.

src/trackerhandle.py

@@ -140,6 +140,6 @@ async def process_single_tracker(tracker):
                 await asyncio.sleep(5)
                 await client.add_to_client(meta, "PTP")
 
-    # Process all trackers concurrently
-    tasks = [process_single_tracker(tracker) for tracker in enabled_trackers]
-    await asyncio.gather(*tasks)
+    # Process each tracker sequentially
+    for tracker in enabled_trackers:
+        await process_single_tracker(tracker)