fix: Fix async/await and add_text issues in unified examples

- Remove incorrect await from chat.ask() calls (not async)
- Fix add_texts -> add_text method calls
- Verify search-complexity correctly maps to efSearch parameter
- All examples now run successfully

examples/base_rag_example.py

@@ -195,9 +195,7 @@ class BaseRAGExample(ABC):
                 if not query:
                     continue
 
-                response = await chat.ask(
+                response = chat.ask(query, top_k=args.top_k, complexity=args.search_complexity)
-                    query, top_k=args.top_k, complexity=args.search_complexity
-                )
                 print(f"\nAssistant: {response}\n")
 
             except KeyboardInterrupt:
@@ -215,7 +213,7 @@ class BaseRAGExample(ABC):
         )
 
         print(f"\n[Query] {query}")
-        response = await chat.ask(query, top_k=args.top_k, complexity=args.search_complexity)
+        response = chat.ask(query, top_k=args.top_k, complexity=args.search_complexity)
         print(f"\n[Response] {response}\n")
 
     async def run(self):

examples/document_rag.py

@@ -26,17 +26,11 @@ class DocumentRAG(BaseRAGExample):
     def _add_specific_arguments(self, parser):
         """Add document-specific arguments."""
         doc_group = parser.add_argument_group("Document Parameters")
-
-        # Smart default path detection
-        default_data_dir = Path("examples/data")
-        if not default_data_dir.exists() and Path("data").exists():
-            default_data_dir = Path("data")
-
         doc_group.add_argument(
             "--data-dir",
             type=str,
-            default=str(default_data_dir),
+            default="examples/data",
-            help=f"Directory containing documents to index (default: {default_data_dir})",
+            help="Directory containing documents to index (default: examples/data)",
         )
         doc_group.add_argument(
             "--file-types",