Add set_ambient_temperature and set_model_plant_params stubs to TempControllerBase

Same pattern as set_model_power: these methods only existed on the Smith
controller, forcing five hasattr guards at call sites. No-op stubs on the
base class give all controllers a stable interface; Smith overrides them.
Remove the now-redundant hasattr guards.

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

tasks/sud.py

@@ -124,8 +124,7 @@ class SudTask(ATask):
 		not just once a run actually starts."""
 		params = self.sud.derive_plant_params(grain_mass, water_mass)
 		self.pot.set_plant_params(params)
-		if hasattr(self.tc, 'set_model_plant_params'):
-			self.tc.set_model_plant_params(params)
+		self.tc.set_model_plant_params(params)
 
 	def apply_stirrer(self, phase):
 		stirrer_cfg = phase.get('stirrer', {})