fetch_targets() called sys.exit(0) on ConnectionRefusedError. Steam's CEF
debugger on port 8080 is not always ready on first run, so the scanner exited
silently and added no shortcuts (issue #895, first-run half).
Replace with retry + exponential backoff (15 attempts, 2s base, 10s cap),
print progress so the retry is visible, and raise the last error instead of
exiting silently.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
