fix(cache): add comment to FileNotFoundError except block

Signed-off-by: Pavan-Rana <psrbr157@gmail.com>

Author: Pavan-Rana

sqlmesh/utils/cache.py

@@ -68,6 +68,7 @@ def __init__(self, path: Path, prefix: t.Optional[str] = None):
                 if not file.stem.startswith(self._cache_version) or stat_result.st_atime < threshold:
                     file.unlink(missing_ok=True)
             except FileNotFoundError:
+                # File was deleted between glob() and stat() — skip stale cache entries gracefully
                 continue
 
     def get_or_load(self, name: str, entry_id: str = "", *, loader: t.Callable[[], T]) -> T: