fix: centralize OPENVINO_PROVIDER_CONFIG and log SystemExit

Address Sourcery review feedback on PR #1879:

- Move OPENVINO_PROVIDER_CONFIG from _onnx_enhancer.py to
  platform_info.py (a leaf module with no modules.* imports), so
  the enhancer and face_swapper no longer import each other just to
  share a constant. _onnx_enhancer re-exports it; face_swapper now
  imports it at module top level instead of inside get_face_swapper().
- Narrow run.py's SystemExit handling: catch SystemExit separately
  and print a [startup] message so the failure is visible instead
  of being swallowed alongside ImportError/FileNotFoundError.

modules/processors/frame/face_swapper.py

@@ -18,6 +18,7 @@ from modules.utilities import (
 )
 from modules.cluster_analysis import find_closest_centroid
 from modules.gpu_processing import gpu_gaussian_blur, gpu_sharpen, gpu_add_weighted, gpu_resize
+from modules.platform_info import OPENVINO_PROVIDER_CONFIG
 import os
 from collections import deque
 import time
@@ -271,9 +272,6 @@ def get_face_swapper() -> Any:
                         # fastest on modern GPUs (Blackwell/sm_120).
                         providers_config.append(p)
                     elif p == "OpenVINOExecutionProvider":
-                        from modules.processors.frame._onnx_enhancer import (
-                            OPENVINO_PROVIDER_CONFIG,
-                        )
                         providers_config.append(OPENVINO_PROVIDER_CONFIG)
                     else:
                         providers_config.append(p)