fix(scraper): guard against AttributeError when img has no parent in process_image

[devteamaegis]

Bug

process_image calls img.getparent() and immediately accesses parent.tag without checking whether parent is None:

parent = img.getparent()
if parent.tag in ["button", "input"]:   # ← AttributeError if parent is None
    return None
parent_classes = parent.get("class", "").split()   # ← same crash

In lxml, getparent() returns None for detached elements — which can happen when remove_empty_elements_fast or other tree modifications remove a parent while child <img> elements are still referenced. Any such image passed to process_image will crash:

AttributeError: 'NoneType' object has no attribute 'tag'

Root cause

The companion removal path at the call-site (line ~328) already guards this correctly:

parent = img.getparent()
if parent is not None:
    parent.remove(img)

But process_image itself — where the crash actually lives — does not.

Fix

Add a None check before accessing .tag / .get(). When the image has no parent, treat parent_classes as empty and let the image proceed to normal scoring — there is no parent context to filter on, so the safest default is to include the image.

parent = img.getparent()
if parent is None:
    parent_classes = []
else:
    if parent.tag in ["button", "input"]:
        return None
    parent_classes = parent.get("class", "").split()