Move set_on_changed registrations from on_process() to __init__()

Callbacks were registered inside the async on_process() coroutine,
meaning they weren't active until the event loop started ticking.
Moving them to __init__ ensures they're wired up at construction time.
Also removes remaining debug prints from the affected task files.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Tqxrk8uj4M3w3d3eXm3xK8

tasks/heater.py

@@ -16,6 +16,8 @@ class HeaterTask(ATask):
 		self.power_soll = 0
 		self.power_actor = 0
 		self.pulse_counter = 0
+		device.set_on_changed('power_eff', ChangedInteger(self.on_changed_power).set)
+		self.power_set_changed = ChangedInteger(self.on_changed_power_set).set
 
 	def actor(self, y):
 		self.power_actor = max(0, self.device.get_power_max() * y)
@@ -52,12 +54,8 @@ class HeaterTask(ATask):
 		return result
 
 	async def on_process(self):
-		print("{}: Started with interval {} s".format(self.msg_handler.get_key(), self.interval))
 		await self.send({'Capabilities': {'Power': {'Min': 0, 'Max': self.device.get_power_max()}}})
 
-		self.device.set_on_changed('power_eff', ChangedInteger(self.on_changed_power).set)
-		power_set_changed = ChangedInteger(self.on_changed_power_set).set
-
 		pulse_period_s = 10
 		pulse_period_count = pulse_period_s/self.interval
 
@@ -65,7 +63,7 @@ class HeaterTask(ATask):
 			while True:
 				# Combine power set from different sources
 				power_soll = max(self.power_soll, self.power_actor)
-				power_set_changed(power_soll)
+				self.power_set_changed(power_soll)
 
 				# Calculate duty cycle
 				power_low = self.get_next_smaller_power(power_soll)