fix: Excessive logging during discovery flow

Excessive logging when the solar inverter goes offline at night #360

custom_components/solarman/discovery.py

@@ -53,7 +53,7 @@ async def _discover(self, ips = IP_BROADCAST, wait = False, source = IP_ANY) ->
                     except (TimeoutError, socket.timeout):
                         break
         except Exception as e:
-            _LOGGER.exception(f"_discover: {format_exception(e)}")
+            _LOGGER.debug(f"_discover exception: {format_exception(e)}")
 
     async def _discover_all(self) -> dict:
         _LOGGER.debug(f"_discover_all")
@@ -90,4 +90,4 @@ async def discover(self, ping_only = False):
             if len(self._devices) == 0:
                 _LOGGER.debug(f"discover: {f'attempts left: {attempts_left}{'' if attempts_left > 0 else ', aborting.'}'}")
 
-        return self._devices
+        return self._devices