build: split the 1423-line root CMakeLists into per-directory files with shared target helpers

src/core/wire/CMakeLists.txt

@@ -0,0 +1,18 @@
+reasampler_pure_library(wire SOURCES wire.cpp)
+reasampler_test(wire LINK wire)
+
+reasampler_pure_library(assignment_request SOURCES assignment_request.cpp LINK PRIVATE wire)
+reasampler_test(assignment_request LINK assignment_request)
+
+reasampler_pure_library(sample_usage SOURCES sample_usage.cpp LINK PRIVATE wire)
+# prune_reconcile composes the protection proof at the pure layer: a capture held by a live
+# instance lands in the referenced union, so pruneOrphans can never emit it.
+reasampler_test(sample_usage LINK sample_usage prune_reconcile)
+
+# The drop payload is built through the instrument's OWN state serializer rather than a
+# parallel byte writer, so the cross-artifact contract cannot drift — hence the link to
+# component_state_io, which stays engine-free. The class-ID string derives from the frozen
+# UID macros, channel-selected via the generated version header, hence its include dir.
+reasampler_pure_library(instrument_drop SOURCES instrument_drop.cpp LINK PUBLIC component_state_io)
+target_include_directories(instrument_drop PUBLIC ${PROJECT_BINARY_DIR}/generated)
+reasampler_test(instrument_drop LINK instrument_drop)