Macro export_input_plugin 

export_input_plugin!() { /* proc-macro */ }

Generates the two loader-visible symbols for one SCS input plugin.

The constructor expression is evaluated once for each accepted input initialization attempt and must produce a value implementing scs_sdk_plugin::InputPlugin. The expansion owns an independent input runtime and emits exactly scs_input_init and scs_input_shutdown.

This macro may coexist with export_plugin in one dynamic library because the input and telemetry runtimes and exported symbol names are distinct. Application source remains safe; raw pointers and ABI declarations are generated only at the audited framework boundary.