feat: embed config in server log; replay_sim takes a single log path

ServerLogTask now embeds the full config in its JSON output, matching
SudLogTask — so replay_sim and analyze_log work on server logs without
needing a separate config file.

replay_sim.py switches from two positional args (date_time, sud_name) to
a single log file path, with config and plant params resolved from the
log's embedded "Config"/"PlantParams" sections when present and falling
back to config.json / hardcoded defaults for older logs.

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

tasks/server_log.py

@@ -16,12 +16,13 @@ class ServerLogTask(ATask):
 	Sud state — useful for verifying controller and heater behaviour
 	outside of a scheduled brew."""
 
-	def __init__(self, tc: APid, heater: AHeater, heater_task, interval, path='./logs'):
+	def __init__(self, tc: APid, heater: AHeater, heater_task, interval, path='./logs', config=None):
 		ATask.__init__(self, interval)
 		self.tc = tc
 		self.heater = heater
 		self.heater_task = heater_task
 		self.path = path
+		self.config = config
 		self._samples = []
 		self._t0 = time.monotonic()
 		self._run_id = time.strftime("%Y%m%dT%H%M%S", time.localtime())
@@ -47,6 +48,10 @@ class ServerLogTask(ATask):
 		os.makedirs(self.path, exist_ok=True)
 		filename = 'log_{}.json'.format(self._run_id)
 		path = os.path.join(self.path, filename)
+		log_data = {'Name': ''}
+		if self.config is not None:
+			log_data['Config'] = self.config
+		log_data['Samples'] = self._samples
 		with open(path, 'w') as f:
-			json.dump({'Name': '', 'Samples': self._samples}, f, indent='\t')
+			json.dump(log_data, f, indent='\t')
 		print('Server log: wrote {} samples to {}'.format(len(self._samples), filename))