* Refactored the BACnet/SC datalink initialization order by moving certificate file checks and hub connection registration to occur after datalink initialization
* Replaced stdlib rand() with platform-specific cryptographically secure random functions (RtlGenRandom for Windows, getrandom for Linux, arc4random_buf for BSD) to generate UUID and VMAC addresses, preventing duplicates that broke connections
* Enabled conditional debug output in BACnet/SC components when BUILD=debug is specified
* Added reject in all confirmed service handlers, except GetEventInformation, when confirmed services with zero length occur which rejects with required parameters are missing message.
* Refactored errno use in service using debug_perror. Changed debug_perror usage to debug_fprintf.
* Updated file and function headers in basic/service modules.
* Changed NDPU priority on confirmed messages to use requested NDPU priority.
* Renamed debug_aprintf to debug_printf_stdout for clarity.
* Convert most debug_fprintf usage to debug_print to reduce text bloat in AVR build
Steve Karg