Trim use-can to buildable runtime sources and standalone Orin package

run_camera.py

@@ -16,11 +16,12 @@ import cv2
 import numpy as np
 ROOT=Path(__file__).resolve().parent
 sys.path.insert(0,str(ROOT/'pipeline'))
-from native_backend import NativeBackend, NativePoseEngine
+from native_backend import NativeBackend
+from pose_engine import NativePoseEngine
 from latest_result import LatestResult, result_to_dict
 from door_mask_risk import DoorMaskSequence, DoorRiskEvaluator
 from door_zone_risk import DoorZoneConfig, DoorZoneAssigner, build_door_risks
-from rtmw_risk_pipeline import render_frame, visualization_skeletons, timing_stats
+from visualization import render_frame, visualization_skeletons, timing_stats
 
 
 def select_active_door(mode, snapshot, side='left', timeout_ms=1000):
@@ -121,7 +122,7 @@ class Preview:
 def parse_args(argv=None):
     p=argparse.ArgumentParser(description=__doc__)
     p.add_argument('--video',type=Path,help='Diagnostic video replay through the same TensorRT/risk chain');p.add_argument('--camera',default='/dev/video5');p.add_argument('--width',type=int,default=1920);p.add_argument('--height',type=int,default=1536);p.add_argument('--fps',type=int,default=30)
-    p.add_argument('--engines',type=Path,default=ROOT/'models/engines')
+    p.add_argument('--engines',type=Path,default=ROOT/'orin/models/engines' if (ROOT/'orin').is_dir() else ROOT/'models/engines')
     p.add_argument('--constant-door-mask',type=Path,default=ROOT/'annotations/constant_door_mask.json')
     p.add_argument('--door-zone-config',type=Path,default=ROOT/'annotations/door_zone_multifeature.json')
     p.add_argument('--active-door',choices=['can','front','rear','both','none'],default='can')