some fixes

data_acq_and_processing/common_cpp/ipc/include/shm_ring.hpp

@@ -56,6 +56,9 @@ class ShmRing {
 
     void close();
     static void validate_name(const std::string& name);
+    // Validates that mapped_size covers the geometry declared in the header
+    // (fix #50: reject undersized/corrupt mappings to prevent OOB slot access).
+    static void validate_geometry(const Header& header, std::size_t mapped_size, const std::string& name);
 };
 
 }  // namespace radar::ipc