fix: add SIGPIPE handler for worktree cleanup

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: aseembits93

codeflash/optimization/optimizer.py

@@ -742,6 +742,7 @@ def run_with_args(args: Namespace) -> None:
     original_sigterm = signal.getsignal(signal.SIGTERM)
     original_sighup = signal.getsignal(signal.SIGHUP)
     original_sigquit = signal.getsignal(signal.SIGQUIT)
+    original_sigpipe = signal.getsignal(signal.SIGPIPE)
 
     def cleanup_worktree_on_exit() -> None:
         if optimizer and optimizer.current_worktree:
@@ -757,6 +758,7 @@ def signal_handler(signum: int, frame: object) -> None:
     signal.signal(signal.SIGTERM, signal_handler)
     signal.signal(signal.SIGHUP, signal_handler)
     signal.signal(signal.SIGQUIT, signal_handler)
+    signal.signal(signal.SIGPIPE, signal_handler)
 
     try:
         optimizer = Optimizer(args)
@@ -772,3 +774,4 @@ def signal_handler(signum: int, frame: object) -> None:
         signal.signal(signal.SIGTERM, original_sigterm)
         signal.signal(signal.SIGHUP, original_sighup)
         signal.signal(signal.SIGQUIT, original_sigquit)
+        signal.signal(signal.SIGPIPE, original_sigpipe)