Extract logging outside of function.

src/tscut/tools/discovery.py

@@ -8,6 +8,7 @@ from shutil import which
 
 from typeguard import typechecked
 
+logger = logging.getLogger(__name__)
 
 class MissingToolError(Exception):
     pass
@@ -29,7 +30,6 @@ def check_required_tools() -> tuple[bool,dict[str,str]]:
             - bool: True if all optional tools are installed, False otherwise
             - dict[str, str]: dictionary containing the paths to all tools
     """
-    logger = logging.getLogger(__name__)
     all_optional_tools = True
     paths = {}
     required = ['ffmpeg', 'ffprobe', 'mkvmerge', 'mkvinfo']