wrapper: build libk4arecord_v2.so — the library the recorder actually dlopens

The recorder does not load the stock libk4a/libk4arecord. It dlopens a single
custom libk4arecord_v2.so: the wrapper's MKV-writing sources linked to a
pure-data shim (k4a_shim.cpp) instead of libk4a, so recording has no OrbbecSDK
dependency. That target is FTF's own (wrapper/recordv2/), absent from the stock
wrapper the Orin carried — so ship it and inject+build it, the same pattern as
the recorder in the SDK examples tree. Idempotent; only added when missing.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

wrapper/recordv2/CMakeLists.txt

@@ -0,0 +1,43 @@
+# Copyright (c) French Touch Factory. All Rights Reserved.
+#
+# libk4arecord_v2 : ecriture MKV compatible K4A sans aucune dependance OrbbecSDK.
+#
+# Reprend telles quelles les sources d'ecriture du wrapper (record.cpp +
+# matroska_write.cpp + iocallback.cpp) mais les lie a k4a_shim.cpp au lieu de
+# libk4a.so, qui implemente k4a_image_t / k4a_capture_t au-dessus d'OrbbecSDK
+# v1.10.18. playback.cpp est volontairement exclu : c'est lui qui appelle
+# ob_create_context(), et le recorder n'a pas besoin de relecture.
+
+set(RECORD_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../record)
+
+add_library(k4arecord_v2 SHARED
+            ${RECORD_SRC_DIR}/sdk/record.cpp
+            ${RECORD_SRC_DIR}/sdk/dll_main.c
+            ${RECORD_SRC_DIR}/internal/iocallback.cpp
+            ${RECORD_SRC_DIR}/internal/matroska_write.cpp
+            k4a_shim.cpp
+            )
+
+# k4arecord_EXPORTS : exporte les k4a_record_* (macro de k4arecord_export.h).
+# k4a_EXPORTS       : idem pour les k4a_image_* / k4a_capture_* du shim, dont la
+#                     visibilite est portee par K4A_EXPORT dans k4a.h.
+target_compile_definitions(k4arecord_v2 PRIVATE k4arecord_EXPORTS k4a_EXPORTS)
+
+target_include_directories(k4arecord_v2 PRIVATE
+                           ${K4A_INCLUDE_DIR}
+                           ${K4A_PRIV_INCLUDE_DIR}
+                           ${CMAKE_CURRENT_SOURCE_DIR}/../include
+                           # k4arecord/k4arecord_export.h, genere par la cible k4arecord
+                           ${CMAKE_BINARY_DIR}/src/orbbec/record/sdk/include
+                           )
+
+# Aucun k4a::k4a, aucun OrbbecSDK : c'est tout l'objet de cette cible.
+target_link_libraries(k4arecord_v2 PRIVATE
+                      k4ainternal::logging
+                      ebml::ebml
+                      matroska::matroska
+                      )
+
+set_target_properties(k4arecord_v2 PROPERTIES
+                      LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib
+                      )