Update codeflash/discovery/functions_to_optimize.py

Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>

Author: KRRT7

codeflash/discovery/functions_to_optimize.py

@@ -202,6 +202,8 @@ def get_files_for_language(
     ignore_dirs: set[str] = set()
     ignore_files: set[Path] = set()
     for p in ignore_paths:
+        p = Path(p) if not isinstance(p, Path) else p
+        if p.is_file():
         if p.is_file():
             ignore_files.add(p)
         else: