fix(benchmarks): keep the server interpreter symlink intact in both LIBERO schedulers

benchmarks/libero-plus/scheduler.py

@@ -1266,7 +1266,10 @@ def main(argv: list[str] | None = None) -> int:
     if args.num_trials is None:
         args.num_trials = 1
     args.ckpt_dir = args.ckpt_dir.expanduser().resolve()
-    args.server_python = args.server_python.expanduser().resolve()
+    # Never resolve the interpreter: a virtualenv's bin/python is a symlink to
+    # the base interpreter, and executing that target directly leaves the venv
+    # undetected, so its site-packages never reach the server's sys.path.
+    args.server_python = args.server_python.expanduser().absolute()
     # Preserve the public default aliases in logs and manifests instead of
     # exposing an implementation-specific physical environment directory.
     args.libero_python = args.libero_python.expanduser().absolute()

benchmarks/libero/scheduler.py

@@ -1200,7 +1200,10 @@ def main(argv: list[str] | None = None) -> int:
     if args.num_trials is None:
         args.num_trials = 50
     args.ckpt_dir = args.ckpt_dir.expanduser().resolve()
-    args.server_python = args.server_python.expanduser().resolve()
+    # Never resolve the interpreter: a virtualenv's bin/python is a symlink to
+    # the base interpreter, and executing that target directly leaves the venv
+    # undetected, so its site-packages never reach the server's sys.path.
+    args.server_python = args.server_python.expanduser().absolute()
     # Preserve the public default aliases in logs and manifests instead of
     # exposing an implementation-specific physical environment directory.
     args.libero_python = args.libero_python.expanduser().absolute()