fix lint failure in clips module

Author: Copilot

poseinterface/clips.py

@@ -219,7 +219,8 @@ def extract_start_frames_label(cliplabels_path: str | Path) -> Path:
     # Validate input filename
     if not cliplabels_path.name.endswith("_cliplabels.json"):
         raise ValueError(
-            f"Input file must end with '_cliplabels.json', got {cliplabels_path.name}"
+            "Input file must end with '_cliplabels.json', "
+            f"got {cliplabels_path.name}"
         )
 
     # Read the cliplabels file
@@ -345,7 +346,8 @@ def extract_start_frames_label_s3(
         # Keep categories unchanged
         start_labels["categories"] = clip_labels["categories"]
 
-        # Generate output key by replacing _cliplabels.json with _startlabels.json
+        # Generate output key by replacing _cliplabels.json with
+        # _startlabels.json
         output_key = key.replace("_cliplabels.json", "_startlabels.json")
         output_uri = f"s3://{bucket_name}/{output_key}"