CyberRT10.0 reader segment fault when protobuf string length > 16

[buaaliyuan]

Describe the bug
protobuf string length > 16 cause reader crash

To Reproduce
Steps to reproduce the behavior:

1. config channel zero copy communication
2. assign string value （char*、&&、& ）>16
3. writer publish message
4. reader subscribe

Expected behavior
reader don't crash

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: x86 or aarch64(orin)
• OS: Linux

Additional context

• string length <= 16，protobuf arena store string content
• string length >16，protobuf arena store string pointer of virtual address of writer process，reader process cant access
• find related issue Segment Fault occurred due to data of string/bytes type field isn't allocated on arena #15621

[hearto1314]

https://protobuf.dev/reference/cpp/arenas/#arenastring
String fields store their data on the heap even when their parent message is on the arena.

You should avoid accessing string fields if arena is enabled, otherwise coredump may be caused as the address spaces of different processes are different.