refactor(ai): Audit and cleanup ai_client.py and gemini_cli_adapter.py

src/gemini_cli_adapter.py

@@ -47,6 +47,7 @@ class GeminiCliAdapter:
     Adapter for the Gemini CLI that parses streaming JSON output.
     """
  def __init__(self, binary_path: str = "gemini"):
+  """Initializes the adapter with the path to the gemini CLI executable."""
   self.binary_path = binary_path
   self.session_id: Optional[str] = None
   self.last_usage: Optional[dict[str, Any]] = None