Route the caller-selected local path fields in load_frida_script,
instrument_with_frida, start_frida_session, start_rizin_debug_session,
and start_gdb_session through the shared localPathStringSchema so a NUL
byte is refused at the advertised contract boundary instead of reaching
the filesystem or a provider subprocess and surfacing as a raw error.
Extend the OS-invalid-local-input acceptance harness to the tools that
were missing from it.