[Enhancement] Add 4G/5G signal stats (RSRP, SNR, etc) to collection

[eponerine]

In an effort to track band, latency, and other status, it would be super-helpful to also scrape the 4G/5G connection stats and output them. Things like RSRP, SNR, etc:

I believe all of this is found on the fastmile_radio_status_web_app.cgi endpoint:

It looks like the hard work is already done here, you're just limiting the data returned to the Band:

tmo-monitor/tmo_monitor/gateway/nokia.py

Lines 134 to 146 in dfc0d1a

	def get_signal_info(self):
	try:
	signal_request = requests.get('http://192.168.12.1/fastmile_radio_status_web_app.cgi')
	except:
	logging.critical("Could not query signal status, exiting.")
	sys.exit(ExitStatus.API_ERROR.value)
	signal_request.raise_for_status()
	info = signal_request.json()
	return {
	'4G': info['cell_LTE_stats_cfg'][0]['stat']['Band'],
	'5G': info['cell_5G_stats_cfg'][0]['stat']['Band']
	}

I only have a Nokia trashcan, so I cannot confirm what this looks like on other gateways.

Apologies if this has been asked or requested, but a quick search for "RSRP" yielded nothing.