DAP: Add intrin DAPSpecs

We now specify intrins as separate DAPS lines. This syntax is much
nicer and well-grouped than the previous negtrin-*/postrin-* param
names.

Alas, we're about to replace it in the next few commits already though.

stimBuffApis/livoxGen1/meshStimulusBuffer.h

@@ -4,6 +4,7 @@
 #include <memory>
 #include <user/stimulusBuffer.h>
 #include <user/stagingBuffer.h>
+#include <user/intrinThresholdParams.h>
 
 namespace smo {
 namespace stim_buff {
@@ -13,6 +14,8 @@ class StimulusProducer;
 
 /**
  * MeshStimulusBuffer is a specialized StimulusBuffer for mesh data.
+ * Intrinsic threshold params are not allowed on mesh qualeIfaceApi lines;
+ * use dedicated negtrin/postrin specs (docs/design/intrin-thresholds.md).
  */
 class MeshStimulusBuffer
 :	public StimulusBuffer
@@ -30,7 +33,11 @@ public:
 			parent, deviceAttachmentSpec, histbuffMs,
 			inputEngineConstraints, outputEngineConstraints,
 			callbacks, flags)
-	{}
+	{
+		intrin::validateIntrinsQualeApiPolicy(
+			deviceAttachmentSpec->qualeIfaceApi,
+			deviceAttachmentSpec->qualeIfaceApiParams);
+	}
 
 	~MeshStimulusBuffer() = default;