Log each Sud run's measured data and forecast to JSON for offline analysis

Add SudLogTask: starts a fresh in-memory buffer the moment a run actually
starts (Sud.state leaves IDLE/DONE) and writes it out whole the moment it
ends (DONE, or aborted via Stop) - log_<date>T<time>_<sud-name>.json holds
the same six signals the GUI's Automatic tab plots live (temp/rate ist+soll,
power set+eff) with per-sample timestamps; forecast_<date>T<time>_<sud-name>.json
holds the final, most-corrected forecast curve from the same run, sharing
the run's date-time token so the two pair up.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DkkuG48uHFCGKe6dPSERFk

server/brewpi.py

@@ -13,7 +13,7 @@ from components.plant import Pot
 from components.actor import HeaterFactory, StirrerFactory
 from components.sud import Sud
 from components.sud_forecast import SudForecastEstimator
-from tasks import TaskManager, TempSensorTask, HeaterTask, PotTask, TcTask, StirrerTask, TracerTask, SudTask
+from tasks import TaskManager, TempSensorTask, HeaterTask, PotTask, TcTask, StirrerTask, TracerTask, SudTask, SudLogTask
 from tracer import Tracer
 
 import argparse as ap
@@ -109,7 +109,12 @@ if __name__ == '__main__':
 	# see components/sud_forecast.py.
 	forecast_estimator = SudForecastEstimator(
 		DT, theta_amb, DEFAULT_PLANT_PARAMS, config['Controller']['pid_type'], config['TempCtrl'], heater.get_power_max())
-	taskmgr.add(SudTask(sud, tc, stirrer, pot, DT, DT_TASK, dispatcher.msgio_get("Sud"), forecast_estimator))
+	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
+	# JSON files under logs/, for later offline analysis - see
+	# tasks/sud_log.py.
+	taskmgr.add(SudLogTask(sud, tc, heater, heater_task, sud_task, DT_TASK))
 
 	# Tracer
 	taskmgr.add(TracerTask(sensor, heater, tc, trace_tc, DT_TASK_TRACER, dispatcher.msgio_get("Tracer")))