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>

components/sud.py

@@ -82,28 +82,38 @@ EMPTY_SUD = {
 
 
 class Sud(AttributeChange):
-	def __init__(self):
+	def __init__(self, pot_config=None):
 		"""Starts out with no schedule loaded - one of potentially several
 		sude/*.json files on disk is brought in later via load(), kept
 		purely in memory (see load()) until replaced or the server
-		restarts."""
+		restarts.
+
+		pot_config provides hardware baseline values (mass, material, L, Td)
+		from config.json's Pot section - a loaded sud.json may override any
+		of them per-brew, but config is the source of truth for the physical
+		kettle."""
 		AttributeChange.__init__(self)
+		self._pot_config = pot_config or {}
 		self._data = EMPTY_SUD
 
 		(self.name, self.description, self.schedule, self.pot_mass,
 			self.pot_material, self.L, self.Td, self.grain_mass,
-			self.water_mass) = self._parse_data(self._data)
+			self.water_mass) = self._parse_data(self._data, self._pot_config)
 
 		self._paused_from = None
 		self._reset_run_state()
 
 	@staticmethod
-	def _parse_data(data):
+	def _parse_data(data, pot_config=None):
 		"""Parses a sud.json document into the (name, description, schedule,
 		pot_mass, pot_material, L, Td, grain_mass, water_mass) tuple Sud
 		needs. Computed up front rather than assigned straight onto self,
 		so a malformed load() can't leave a half-applied schedule in
-		place."""
+		place.
+
+		pot_config (from config.json's Pot section) provides hardware baseline
+		values; a sud.json's own pot section overrides any of them per-brew."""
+		pot_config = pot_config or {}
 		name = data.get('Name', '')
 		description = data.get('Description', '')
 
@@ -111,10 +121,10 @@ class Sud(AttributeChange):
 		schedule = [_build_step(i + 1, step_defaults, raw) for i, raw in enumerate(data['steps'])]
 
 		pot_data = data.get('pot', {})
-		pot_mass = pot_data.get('mass', 0)
-		pot_material = pot_data.get('material')
-		L = pot_data.get('L', EMPTY_SUD['pot']['L'])
-		Td = pot_data.get('Td', EMPTY_SUD['pot']['Td'])
+		pot_mass = pot_data.get('mass', pot_config.get('mass', 0))
+		pot_material = pot_data.get('material', pot_config.get('material'))
+		L = pot_data.get('L', pot_config.get('L', EMPTY_SUD['pot']['L']))
+		Td = pot_data.get('Td', pot_config.get('Td', EMPTY_SUD['pot']['Td']))
 		grain_mass = pot_data.get('grain_mass', EMPTY_SUD['pot']['grain_mass'])
 		water_mass = pot_data.get('water_mass', EMPTY_SUD['pot']['water_mass'])
 
@@ -147,7 +157,7 @@ class Sud(AttributeChange):
 		if self.state not in (SudState.IDLE, SudState.DONE):
 			return False
 		try:
-			parsed = self._parse_data(data)
+			parsed = self._parse_data(data, self._pot_config)
 		except (KeyError, TypeError):
 			return False