Adds intake_mode (bundled / separate / remote) so staff can mark
applications received with a single bundled PDF, the existing
separate-pages-file flow, or a pending remote signature. Folds in
content-based PDF validation, a friendlier status-gate message,
and a page-count helper for the original application.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
New boolean on sale.order tracks whether pages 11 & 12 are bundled
inside the original application PDF. Computed helper
x_fc_has_signed_pages_11_12 ORs bundled flag with separate-file and
remote-signing presence so downstream gates can read one field.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>