fix: use context manager for ZipFile in extract_zipped_paths

[shindonghwi]

Found that extract_zipped_paths() opens a ZipFile but never closes it.

When member is not found and returns early, the ZipFile remains open. Fixed by wrapping with context manager.

# before
zip_file = zipfile.ZipFile(archive)
if member not in zip_file.namelist():
    return path  # leak

# after  
with zipfile.ZipFile(archive) as zip_file:
    if member not in zip_file.namelist():
        return path  # properly closed

Added a test to verify close() is called.