After poor performance, added more logging output

src/ble_reticulum/BLEInterface.py

@@ -477,6 +477,14 @@ class BLEInterface(Interface):
             f"reassembler={BLEReassembler.__module__}.{BLEReassembler.__name__})",
             RNS.LOG_NOTICE
         )
+        if os.environ.get("BLE_RETICULUM_FRAGMENTATION_BACKEND_REPORT", "").lower() in ["1", "yes", "true", "on"]:
+            print(
+                f"{self} fragmentation backend: {BLE_FRAGMENTATION_BACKEND} "
+                f"(fragmenter={BLEFragmenter.__module__}.{BLEFragmenter.__name__}, "
+                f"reassembler={BLEReassembler.__module__}.{BLEReassembler.__name__})",
+                file=sys.stderr,
+                flush=True,
+            )
         RNS.log(f"{self} power mode: {self.power_mode}, max peers: {self.max_peers}", RNS.LOG_DEBUG)
         RNS.log(f"{self} central mode: {'ENABLED' if self.enable_central else 'DISABLED'}", RNS.LOG_INFO)
         RNS.log(f"{self} peripheral mode: {'ENABLED' if self.enable_peripheral else 'DISABLED'}", RNS.LOG_INFO)