PHLEGM v6 firmware cache for PET-2001-32N

This directory intentionally contains no Commodore ROM binaries.
The machine's firmware.config.phlegm declares the accepted filenames, exact sizes, any known
CRC32 values, and a preferred source URL for generic on-demand acquisition.

Profile: dynamic-RAM PET 2001-N
Keyboard: normal/graphics
ROM generation: BASIC 2
Display: 40 x 25, fixed screen base $8000 (pre-CRTC)
RAM: 32 KiB ($0000-$7FFF)

When an accepted CRC32 field is empty, PHLEGM still enforces the exact ROM byte size;
that slot will gain checksum enforcement when an authoritative per-device CRC is
recorded in firmware.config.phlegm.
