Migrate to uv; fix clippings paths and wrapper

clippings_search/retrieve_clippings.py

@@ -11,6 +11,13 @@
 # libraries, because huggingface_hub.constants evaluates HF_HUB_OFFLINE
 # at import time.
 import os
+from pathlib import Path
+
+# This script lives in clippings_search/ but uses ./ paths relative to the
+# project root (./models, ./clippings_search/store_clippings). Anchor the CWD
+# to the project root so it works no matter where it's invoked from.
+os.chdir(Path(__file__).resolve().parent.parent)
+
 os.environ["TOKENIZERS_PARALLELISM"] = "false"
 os.environ["SENTENCE_TRANSFORMERS_HOME"] = "./models"
 os.environ["HF_HUB_OFFLINE"] = "1"