This fixes GitHub issue #4062 where crewai crashes on Windows with
'module signal has no attribute SIGHUP' error.
Changes:
- Use getattr with fallback values for signals not available on Windows
- Make telemetry signal registration conditional on signal availability
- Add regression tests for Windows compatibility
The fix maintains backward compatibility on Unix systems while allowing
crewai to work on Windows where SIGHUP, SIGTSTP, and SIGCONT are not
available.
Co-Authored-By: João <joao@crewai.com>
7d9d96d0db