Merge ps-w7-ingest: S8 ingest through the bank (extension side)

CMakeLists.txt

@@ -301,6 +301,19 @@ target_include_directories(app_version PUBLIC src ${CMAKE_CURRENT_BINARY_DIR}/ge
 add_library(provenance STATIC src/provenance.cpp)
 target_include_directories(provenance PUBLIC src)
 
+# ---------------------------------------------------------------------------
+# 2j') Pure assignment_request library — NO REAPER, NO SWELL, NO VST3. The S8 ingest
+#      assignment-request wire format: the (bankId, sampleId, generation) value the
+#      EXTENSION writes to "reasampler" ext-state after an ingest-with-assign, decoded by
+#      the VST3 instrument in a later dispatch. Only the wire (build/parse round-trip)
+#      lives here — writing it is the persist shell's job, reading it the instrument's.
+#      Split out (mirror of provenance / owned_manifest) so the format both artifacts
+#      depend on is unit-tested outside the DAW; the reader lands in a separate artifact,
+#      so the round-trip test is the contract guard. No dependency — plain strings + int64.
+# ---------------------------------------------------------------------------
+add_library(assignment_request STATIC src/assignment_request.cpp)
+target_include_directories(assignment_request PUBLIC src)
+
 # ---------------------------------------------------------------------------
 # 2k) Pure action_buttons library — NO REAPER, NO SWELL. The Milestone 11
 #     action-trigger button strip: strip rect + N buttons at a minimum width ->
@@ -600,6 +613,10 @@ add_executable(card_drag_tests tests/test_card_drag.cpp)
 target_link_libraries(card_drag_tests PRIVATE card_drag)
 add_test(NAME card_drag_tests COMMAND card_drag_tests)
 
+add_executable(assignment_request_tests tests/test_assignment_request.cpp)
+target_link_libraries(assignment_request_tests PRIVATE assignment_request)
+add_test(NAME assignment_request_tests COMMAND assignment_request_tests)
+
 # sampler_core: the S3 heart. Links ONLY sampler_core (+ its peaks dep) — NEITHER the
 # VST3 SDK nor the REAPER SDK — which is the structural proof of the plain-data
 # boundary (a VST3/REAPER type in the core would fail to compile/link here).
@@ -741,6 +758,7 @@ add_library(reaper_reasampler MODULE
     src/lane_keys.cpp
     src/item_read.cpp
     src/actions.cpp
+    src/ingest.cpp
     src/bank_book.cpp
     src/owned_manifest.cpp
     src/drag_out_win.cpp
@@ -752,7 +770,7 @@ add_library(reaper_reasampler MODULE
     src/card_meta.cpp
     src/card_drag.cpp
 )
-target_link_libraries(reaper_reasampler PRIVATE bank_model capture_paths peaks bank_grid mode_switch tab_strip view_mode_model insert_plan render_settings batch_capture tail_control realtime_record bank_book wav_trim owned_manifest prune_reconcile prune_button app_version provenance action_buttons drag_out theme component_geometry action_bar footer_bar overflow_menu mode_enable tooltip card_meta card_drag)
+target_link_libraries(reaper_reasampler PRIVATE bank_model capture_paths peaks bank_grid mode_switch tab_strip view_mode_model insert_plan render_settings batch_capture tail_control realtime_record bank_book wav_trim owned_manifest prune_reconcile prune_button app_version provenance action_buttons drag_out theme component_geometry action_bar footer_bar overflow_menu mode_enable tooltip card_meta card_drag assignment_request)
 target_include_directories(reaper_reasampler PRIVATE ${SDK_INC} ${WDL_INC})
 # OUTPUT_NAME is channel-derived (Phase V, V4): "reaper_reasampler" (stable, default) or
 # "reaper_reasampler_beta" (beta). REAPER dlopen's any reaper_* module, so both channels'