Need to change logging statements to fstrings

[FlyingDiver]

Describe the bug

The current logging statements don't work properly if the application using the library has custom logging formats.

To Reproduce
Steps to reproduce the behavior:

Set up a custom logging format like this:

        logging.basicConfig(level=logging.INFO, format='%(asctime)s.%(msecs)02d\t%(levelname)6s %(name)12s.%(funcName)-30s%(msg)s',datefmt='%Y-%m-%d %H:%M:%S')
        self.logger = logging.getLogger("SimpliSafe")

When the library logs something with a % argument, you get:

2022-06-13 15:59:09.453	  INFO     simplipy._log_backoff                  Backing off %s(...) for %.1fs (%s)

When you fix it like this:

        LOGGER.info(f"Websocket watchdog triggered – sleeping for {self._timeout_seconds} seconds")

You get:

2022-06-13 15:59:26.138	  INFO     simplipy.trigger                       Websocket watchdog triggered – sleeping for 300.0 seconds

[bachya]

You're comparing two different logs (one for a REST API backoff, one for the websocket watchdog)...

[FlyingDiver]

I just showed both situations, one where I already fixed it and one where I didn't. It happens everywhere.

[bachya]

Just use the message attribute (instead of msg):

%(asctime)s.%(msecs)02d\t%(levelname)6s %(name)12s.%(funcName)-30s%(message)s

msg is just the raw message; message includes the args passed to it.

[FlyingDiver]

Now there's a great API naming convention. I've been using that formatter for so long I forgot there was a difference.