RSN.2 Resin file: Elegoo GOO (add-on printer-resin-goo)

Built in the lab, from Elegoo's published Goo Format Spec V1.2 with no third-party source read. What the spec leaves open is now switchable on the card: byte order (big or little endian; big by default from an unverified secondary report) and checksum (negated sum or plain sum). The spec's own example offset cannot be reached by its field table (the table gives 195,477 bytes, the example 195,255), so the example is read as illustrative. Other gaps are marked SPEC-GAP in rs-goo.js. Read back by our own reader only (86/0). A real Elegoo printer is the check.