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).

components/actor/hendiCtrl.py

@@ -1,5 +1,6 @@
 #!/usr/bin/python3
 
+import logging
 import time
 import serial
 import sys
@@ -11,6 +12,7 @@ class HendiException(Exception):
 
 class HendiCtrl:
 	def __init__(self, port, speed, debug=False):
+		self.log = logging.getLogger(type(self).__name__)
 		self.debug = debug
 		self.prompt = b':'
 		self.sw_id = None
@@ -48,7 +50,7 @@ class HendiCtrl:
 		try:
 			self.ser.open()
 		except serial.SerialException as e:
-			print(f"HendiCtrl: connect failed: {e}")
+			self.log.error(f"connect failed: {e}")
 			return False
 		# The port itself is what "connected" means - a failed version query
 		# (e.g. the device sitting in its ungraceful-disconnect lockout, see
@@ -57,9 +59,9 @@ class HendiCtrl:
 		try:
 			self.sw_id = self.getSoftwareIdentifier()
 			self.sw_ver = self.getSoftwareVersion()
-			print(f"{self.sw_id}, F/W-Version: {self.sw_ver}")
+			self.log.info(f"{self.sw_id}, F/W-Version: {self.sw_ver}")
 		except HendiException:
-			print("HendiCtrl: Hendi not found")
+			self.log.warning("Hendi not found")
 		return True
 
 	@contextmanager
@@ -91,7 +93,7 @@ class HendiCtrl:
 		self.ser.rts = True
 
 	def firmware_update(self, filename):
-		print("Start firmware update")
+		self.log.info("Start firmware update")
 		self.enter_bootloader()
 		self.ser.readline()
 
@@ -122,7 +124,7 @@ class HendiCtrl:
 		self.ser.flushInput()
 		data = s.encode()
 		if self.debug:
-			print(f"HendiCtrl: -> {data!r}")
+			self.log.debug(f"-> {data!r}")
 		self.ser.write(data + b'\r')
 
 	def __read(self):
@@ -132,7 +134,7 @@ class HendiCtrl:
 		# Read answer line
 		answer_raw = self.ser.readline()
 		if self.debug:
-			print(f"HendiCtrl: <- echo={echo!r} answer={answer_raw!r}")
+			self.log.debug(f"<- echo={echo!r} answer={answer_raw!r}")
 		answer = answer_raw.decode('utf-8').replace('\r', '').replace('\n', '')
 		if ':' in answer:
 			result = answer.split(':')