Whether the file declared per-block CRC32.
The decoded plain G-code (all GCode blocks concatenated in file order).
Merged INI key/values from the File/Printer/Print/Slicer metadata blocks (#188 phase 4c) — only
populated when metadata: true. Later blocks win on key conflicts. Empty otherwise.
Thumbnails from Thumbnail blocks (#188 phase 4c) — only when metadata: true.
Every block walked, in file order (for diagnostics / phase-4 metadata).