Document ChromaDB Python 3.14 compat shim in CLAUDE.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Douglas Williams

CLAUDE.md

@@ -23,4 +23,6 @@
     constants.py defines all paths, model names, and categories.
     Ollama tests are marked @pytest.mark.ollama and skipped in CI.
     Index is idempotent — deletes and recreates the collection each run.
-    CLAUDE.md is in .gitignore (not checked in).
+    _chromadb_compat.py must be imported before chromadb in any module.
+    It patches a Pydantic v1 type inference bug that breaks on Python 3.14.
+    Any new file that imports chromadb needs: import _chromadb_compat first.