log: route task/component status output through logging, not print()

AttributeChange (the common base of every ATask and component ABC) now
sets self.log = logging.getLogger(type(self).__name__), so components
no longer need to hand-type their own name into each message. Wired
logging.basicConfig() in server/brewpi.py with a bare "%(name)s:
%(message)s" formatter - Tee (see prior commit) still supplies the
"<date>T<time>:" prefix, so lines read "<date>T<time>:<component>:
<message>" without double-stamping, and third-party loggers
(websockets, asyncio) now get the same formatting for free.

Converted the print() call sites that were standing in for this in
tasks/ and components/ (leaving __main__ demo blocks and explicit
debug-dump helpers alone).

tasks/tempsensor.py

@@ -24,7 +24,7 @@ class TempSensorTask(ATask):
 		try:
 			self.sensor.temperature()
 		except Exception as e:
-			print(f"TempSensorTask: comm error priming sensor: {e}")
+			self.log.error(f"comm error priming sensor: {e}")
 		self.sensor.set_on_changed("temp", ChangedFloat(self.on_temp_changed, prec=1).set)
 
 	def on_temp_changed(self, value):
@@ -44,5 +44,5 @@ class TempSensorTask(ATask):
 			try:
 				self.sensor.temperature()
 			except Exception as e:
-				print(f"TempSensorTask: comm error reading sensor: {e}")
+				self.log.error(f"comm error reading sensor: {e}")
 			await asyncio.sleep(self.interval)