The official MCS-150/150B/150C PDFs ship with 8 (150/150B) or 4 (150C)
FMCSA instruction/example pages before the actual fillable form. We were
generating + faxing/submitting all of them. Trimmed the source templates
down to the FORM pages only:
MCS-150 11 -> 3 pages (289 fields preserved)
MCS-150B 12 -> 4 pages (349 fields preserved)
MCS-150C 6 -> 2 pages (33 fields preserved)
The filler iterates writer.pages (no absolute index) and signature
anchors are derived dynamically via enumerate(reader.pages), so no
page-specific markup needed fixing. Removed one-off diag script.
