refactor: move pot hardware params and pid_type out of per-brew docs

Pot hardware constants (mass, material, L, Td) moved from sude/*.json
to config.json's Pot section; Sud/SudForecastEstimator accept pot_config
as baseline, per-brew pot sections may still override. Controller key
removed; pid_type moved into TempCtrl.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/brewpi.py

@@ -81,7 +81,7 @@ if __name__ == '__main__':
 
 	# Mash schedule - starts out empty; a client loads one of sude/*.json's
 	# several schedules onto it later (see components/sud.py's Sud).
-	sud = Sud()
+	sud = Sud(config.get('Pot', {}))
 
 	# Heater/Pot/Sensor - built together as one consistent rig; each
 	# component's type comes from its own config section. Heater.type==sim
@@ -113,7 +113,7 @@ if __name__ == '__main__':
 	# temp_controller_smith.py.), and Smith's model plant params are -
 	# like the real Pot's above - deliberately left unset here, only
 	# ever coming from a Sud's own doc.
-	tc = PidFactory.create(config['Controller']['pid_type'], DT)
+	tc = PidFactory.create(config['TempCtrl']['pid_type'], DT)
 	tc.set_params(config['TempCtrl'])
 	tc.set_ambient_temperature(theta_amb)
 	tc_task = TcTask(tc, DT_TASK, dispatcher.msgio_get("TempCtrl"))
@@ -128,8 +128,8 @@ if __name__ == '__main__':
 	# it with the same kind of plant/controller (and params) as above -
 	# see components/sud_forecast.py.
 	forecast_estimator = SudForecastEstimator(
-		DT, theta_amb, config['Controller']['pid_type'], config['TempCtrl'],
-		heater.get_powers(), args.sim_warp_factor)
+		DT, theta_amb, config['TempCtrl']['pid_type'], config['TempCtrl'],
+		heater.get_powers(), args.sim_warp_factor, config.get('Pot', {}))
 	sud_task = SudTask(sud, tc, stirrer, pot, DT, DT_TASK, dispatcher.msgio_get("Sud"), forecast_estimator)
 	taskmgr.add(sud_task)
 	# Records every Sud run's measured data and forecast to their own