Improve docs and security defaults

src/cli/Main.py

@@ -43,6 +43,8 @@ class MatchNotFoundError(Exception):
 
 
 class SeriesApp:
+    """Interactive CLI controller orchestrating scanning and downloads."""
+
     _initialization_count = 0  # Track initialization calls
     
     def __init__(self, directory_to_search: str) -> None: