StimulusProducer: add duplicate-quale guard and attach-identity buffer lookup.

Provide ensureNoDuplicateQualeIface and getAttachedStimulusBufferByAttachIdentity
so session-scoped stimBuff plugins can reject duplicate quales and detach by
stable DAP line identity rather than full spec equality.

Co-authored-by: Cursor <cursoragent@cursor.com>

commonLibs/attachmentSupport/tests/CMakeLists.txt

@@ -41,3 +41,29 @@ add_dependencies(intrinThresholdParams_tests gtest_main)
 add_test(
 	NAME intrinThresholdParams_tests
 	COMMAND intrinThresholdParams_tests)
+
+add_executable(stimulusProducerQualeIface_tests
+	stimulusProducerQualeIface_tests.cpp
+)
+
+target_include_directories(stimulusProducerQualeIface_tests PRIVATE
+	${CMAKE_SOURCE_DIR}/include
+	${CMAKE_BINARY_DIR}/include
+	${CMAKE_SOURCE_DIR}/libspinscale/tests
+	${CMAKE_SOURCE_DIR}/smocore/include
+)
+
+target_link_libraries(stimulusProducerQualeIface_tests
+	gtest_main
+	attachmentSupport
+	spinscale
+	spinscale_test_support
+	${Boost_LIBRARIES}
+	${OPENCL_LIBRARIES}
+)
+
+add_dependencies(stimulusProducerQualeIface_tests gtest_main)
+
+add_test(
+	NAME stimulusProducerQualeIface_tests
+	COMMAND stimulusProducerQualeIface_tests)