chore: periodic gc.collect() on HTTP thread after disabling GC for RT

main.py

@@ -845,6 +845,7 @@ def main() -> int:
     try:
         import gc
         gc.disable()
+        gc.collect()  # One final sweep to clear boot-time cyclic garbage
         logger.info("GC disabled for RT audio stability")
     except Exception as exc:
         logger.warning("Could not disable GC: %s", exc)