Add the FX reclaimer: a debounced, time-boxed convergence loop that offlines parked chains and restores returning ones off the switch path

src/app/CMakeLists.txt

@@ -39,6 +39,7 @@ add_library(reaper_reasampler MODULE
     ${LICE_SRC}
     ${REASAMPLER_SRC_DIR}/shell/capture/insert.cpp
     ${REASAMPLER_SRC_DIR}/shell/view/view.cpp
+    ${REASAMPLER_SRC_DIR}/shell/view/fx_reclaim.cpp
     ${REASAMPLER_SRC_DIR}/shell/view/view_lanes.cpp
     ${REASAMPLER_SRC_DIR}/shell/view/view_park.cpp
     ${REASAMPLER_SRC_DIR}/shell/view/view_reconcile.cpp
@@ -72,6 +73,9 @@ target_include_directories(reaper_reasampler PRIVATE ${SDK_INC} ${WDL_INC})
 # has none — its TUs are compiled into this target directly.
 reasampler_test(view_park LINK view_mode_model)
 reasampler_test(view_reconcile LINK applied_state view_mode_model)
+# The reclaimer's drain loop is templated on its host for exactly this reason: the
+# ordering, budget, debounce and resume bookkeeping run against a fake chain.
+reasampler_test(fx_reclaim LINK fx_state)
 
 # Bank-package import: the promptless verb plus its action skin. Kept as its own
 # appended block rather than merged into the lists above, so the two package