fix: link psi_paging.cpp into pyabacus diagopack for get_cpu_pointer_safe

Pyabacus diagopack compiles psi.cpp directly and needs psi_paging.cpp
for the get_cpu_pointer_safe / set_storage_mode / load_k_to_gpu symbols.

Author: dyzheng

python/pyabacus/src/hsolver/CMakeLists.txt

@@ -20,6 +20,7 @@ list(APPEND _diago
     ${BASE_PATH}/module_device/memory_op.cpp
 
     ${PSI_PATH}/psi.cpp
+    ${PSI_PATH}/psi_paging.cpp
   )
 add_library(diagopack SHARED 
     ${_diago}