fix: Invalidate cache of removed input sockets.

This was a nasty (interesting?) one - usually, input sockets are not attempted used
after the socket no longer exists.
Various checks in ex. `events` tend to help that process along.

Unfortunately (fortunately?), `Extract` uses a `_compute_input` query with
`optional=True`, which results in a direct attempt to hit the cache
without any other checks.
Because old input socket caches were never deleted, it would
**continue to get cached data from sockets that no longer exist**.

While on the surface this could be considered a case of "the
private method (`_compute_input`) is private for a reason", or
alternatively, "don't hijack the graph flow", I'm more convinced that
the usage is actually quite clean, being read-only and generally
well-conceived. It's reasonable to presume that asking for a thing that
doesn't exist won't produce output!

Moreover, I wouldn't be surprised if several other mysterious bugs were
caused by this. Not to mention the memory leak of endless caching! (Well,
until the node is deleted). It's a good things we noticed!

src/blender_maxwell/node_trees/maxwell_sim_nodes/nodes/analysis/extract_data.py

@@ -69,10 +69,8 @@ class ExtractDataNode(base.MaxwellSimNode):
 			'Sim Data', kind=ct.FlowKind.Value, optional=True
 		)
 		if not ct.FlowSignal.check(sim_data):
-			log.critical('Sim Data was Not FlowSignal')
 			return sim_data
 
-		log.critical('Sim Data was FlowSignal: %s', str(sim_data))
 		return None
 
 	@bl_cache.cached_bl_property()
@@ -190,9 +188,6 @@ class ExtractDataNode(base.MaxwellSimNode):
 		Returns:
 			Valid `self.extract_filter` in a format compatible with dynamic `EnumProperty`.
 		"""
-		log.critical('Searching Extract Filters')
-		log.critical(self.sim_data_monitor_nametype)
-		log.critical(self.monitor_data_components)
 		if self.sim_data_monitor_nametype is not None:
 			return [
 				(monitor_name, monitor_name, monitor_type.removesuffix('Data'), '', i)

src/blender_maxwell/node_trees/maxwell_sim_nodes/nodes/base.py

@@ -430,6 +430,11 @@ class MaxwellSimNode(bpy.types.Node):
 			# Remove Sockets
 			for bl_socket in bl_sockets_to_remove:
 				node_tree.on_node_socket_removed(bl_socket)
+				self._compute_input.invalidate(
+					input_socket_name=bl_socket.name,
+					kind=...,
+					unit_system=...,
+				)
 				all_bl_sockets.remove(bl_socket)
 
 	def _add_new_active_sockets(self):
@@ -771,12 +776,6 @@ class MaxwellSimNode(bpy.types.Node):
 			# Invalidate Input Socket Cache
 			if input_socket_name is not None:
 				if socket_kinds is None:
-					log.critical(
-						'[%s] Invalidating: (%s, %s)',
-						self.sim_node_name,
-						input_socket_name,
-						str(socket_kinds),
-					)
 					self._compute_input.invalidate(
 						input_socket_name=input_socket_name,
 						kind=...,
@@ -784,12 +783,6 @@ class MaxwellSimNode(bpy.types.Node):
 					)
 				else:
 					for socket_kind in socket_kinds:
-						log.critical(
-							'[%s] Invalidating: (%s, %s)',
-							self.sim_node_name,
-							input_socket_name,
-							str(socket_kind),
-						)
 						self._compute_input.invalidate(
 							input_socket_name=input_socket_name,
 							kind=socket_kind,
@@ -844,15 +837,11 @@ class MaxwellSimNode(bpy.types.Node):
 		)
 		for event_method in triggered_event_methods:
 			stop_propagation |= event_method.stop_propagation
-			log.critical(
+			# log.critical(
-				'$[%s] [%s %s %s %s] Running: (%s)',
+			# '$[%s] [%s %s %s %s] Running: (%s)',
-				self.sim_node_name,
+			# self.sim_node_name,
-				event,
+			# event_method.callback_info,
-				socket_name,
+			# )
-				socket_kinds,
-				prop_name,
-				event_method.callback_info,
-			)
 			event_method(self)
 
 		# Propagate Event to All Sockets in "Trigger Direction"