env = env  # noqa
import re
rep = env.ref('fusion_plating_reports.action_report_fp_bol_portrait')
dlv = env['fusion.plating.delivery'].search([], order='id desc', limit=1)
html, _ = rep.with_context(force_report_rendering=True
    )._render_qweb_html(rep.report_name, [dlv.id])
out = html.decode() if isinstance(html, bytes) else str(html)
# Extract the sig-table block + 200 chars before and after
m = re.search(r'(.{0,400})(<table class="bordered sig-table".*?</table>)(.{0,200})', out, re.S)
if m:
    print('=== before ===')
    print(m.group(1)[-300:])
    print('=== sig-table ===')
    print(m.group(2))
else:
    print('NOT FOUND. Looking for any sig-table:')
    for m in re.finditer(r'<table[^>]*sig[^>]*>', out):
        print(' ', m.group(0))
    # Also search for the labels
    for label in ['Shipper (Signature', 'sig-cell', 'sig-table', 'sig-box']:
        i = out.find(label)
        print(f'  {label!r}: pos={i}')