minor config change

src/knowlang/configs/chat_config.py

@@ -1,3 +1,4 @@
+from typing import Optional
 from pydantic import Field
 from pydantic_settings import BaseSettings
 from enum import Enum
@@ -42,7 +43,7 @@ class ChatbotAnalyticsConfig(BaseSettings):
         description="Analytics provider to use for tracking feedback"
     )
 
-    api_key: str = Field(
+    api_key: Optional[str] = Field(
         default=None,
         description="api key for feedback tracking"
     )

src/knowlang/configs/config.py

@@ -132,11 +132,11 @@ class LLMConfig(BaseSettings):
 
 class DBConfig(BaseSettings):
     persist_directory: Path = Field(
-        default=Path("./chroma_db"),
+        default=Path("./chromadb"),
         description="Directory to store ChromaDB files"
     )
     collection_name: str = Field(
-        default="code_chunks",
+        default="code",
         description="Name of the ChromaDB collection"
     )
     codebase_directory: Path = Field(