concorekill.bat written to CWD on every import, never cleaned up

[avinxshKD]

concore.py lines 18-20:

if hasattr(sys, 'getwindowsversion'):
    with open("concorekill.bat","w") as fpid:
        fpid.write("taskkill /F /PID "+str(os.getpid())+"\n")

Two problems:

1. If two concore processes start in the same directory, the second one silently overwrites the first one's kill script. The first process becomes unkillable via its .bat file since the PID inside now belongs to process File Receiving Interface. #2.

2. The file is never deleted on exit. Run a few workflows and you end up with stale concorekill.bat files pointing to long-dead PIDs. Harmless on their own, but confusing — a user running the leftover .bat would either kill the wrong process or get "process not found" errors.

Should either use a unique filename per process (e.g. concorekill_{pid}.bat) or register an atexit handler to clean it up Or both.

[avinxshKD]

@pradeeban pls let me know what do you think?? Pr is almost ready if any changes needed, thanks