chore-debug: add debug prints to inspect query and document embeddings

During debugging, added stderr prints to output first 5 values of query embeddings and compare the first 10 values of the first two document embeddings to check for duplicates or issues in the retrieval process.

warbler_cda/retrieval_api.py

@@ -396,9 +396,10 @@ class RetrievalAPI:
 
         # If embedding provider available, use it
         if self.embedding_provider:
-            # Get query embedding
+                # Get query embedding
             try:
                 query_embedding = self.embedding_provider.embed_text(query.semantic_query)
+                print(f"DEBUG: query_embedding first 5 values: {query_embedding[:5] if query_embedding else 'None'}", file=sys.stderr)
             except OSError:
                 return results
 
@@ -500,6 +501,15 @@ class RetrievalAPI:
                 embeddings_list.append(doc_data["embedding"])
                 doc_ids.append(doc_id)
 
+        # DEBUG - check first few embeddings
+        if embeddings_list:
+            import sys
+            print(f"DEBUG: First document embedding first 5: {embeddings_list[0][:5] if len(embeddings_list) > 0 else 'None'}", file=sys.stderr)
+            if len(embeddings_list) > 1:
+                print(f"DEBUG: Second document embedding first 5: {embeddings_list[1][:5] if len(embeddings_list) > 1 else 'None'}", file=sys.stderr)
+                same = embeddings_list[0][:10] == embeddings_list[1][:10]  # Compare first 10 values
+                print(f"DEBUG: First two embeddings identical? {same}", file=sys.stderr)
+
         if not embeddings_list:
             return self._search_context_store_keyword(query)