Fixing some filter paralleism

gnommo/transformer.py

@@ -586,6 +586,14 @@ def build_render_plan(
     elif (project_path.parent / "shared_assets").exists():
         shared_assets_dir = project_path.parent / "shared_assets"
 
+    # Resolve process_cache per-project directory
+    process_cache_dir = None
+    if config.process_cache:
+        _pc = Path(config.process_cache)
+        if not _pc.is_absolute():
+            _pc = (project_path / _pc).resolve()
+        process_cache_dir = _pc / project_path.name
+
     narration_video = videos[narration_video_id]
     cutout = config.cutouts[narration_video.cutout]
 
@@ -800,6 +808,7 @@ def build_render_plan(
         outro_events=outro_events,
         narration_end_time=narration_end_time,
         cached_files=cached_files,
+        process_cache_dir=process_cache_dir,
     )
 
     return plan, marker_timings