CHANGELOG - Caffeine (CAS 58-08-2) - READY TO PRINT

r19 (this package, ready-to-print release 2026-10-28, package r19): texts only; geometry as in r11 (STL SHA-256 61bbb8ec736087dbfad3fb423807465294afff81c257254bf4b07e0728b97f0b).
    Website and data sheet wording: print-shop guidance (ZIP + PDF), licence notes, file labels.
r18 (2026-10-28): data sheet page 1 shows the underside render (QR code, lettering, licence text); PROVENANCE
    gives the first PubChem retrieval date (the same as the licence page).
r17 (2026-10-28): the STL without supports moved to advanced_no-supports/ - only files with supports at the top.
r16 (2026-10-28): the 3MF renamed ..._3MF-project_supports-generated-when-sliced.3mf: it holds the support SETTINGS,
    the supports are generated when you slice (r15 called it WITH-SUPPORTS - that name was wrong).
r15 (2026-10-28): file names say WITH-SUPPORTS (G-code) and NO-SUPPORTS (STL); README section WHICH FILE TO USE.
r14 (2026-10-28): temperatures stated the same way everywhere (3MF profile and ready G-code, values from the files);
    the licence history described by download date and by the text on the underside of the base.
r13 (2026-10-28): licence text only; geometry as in r11.
    Renders and preview images are now CC BY-NC-SA 4.0, like the model (before: all rights reserved);
    LICENSE.txt states that a paid 3D printing service is commercial use and needs our commercial licence.
r12 (2026-10-28): documentation update; geometry as in r11. LICENSE.txt and the website describe the earlier downloads (22-27 October 2026) consistently; LICENSE.txt links the licence
    record; PRINT_INSTRUCTIONS say how to keep the project settings when you switch printer; the feedback form
    asks separately for consent to be thanked by name; the data sheet shows the package number, the attribution
    and the ready G-code times; previews/ holds the website gallery renders.
r11 (2026-10-28): geometry changed - the text engraved on the underside of the base and the STL file header
    read "CC BY-NC-SA 4.0" (r01-r10: "CC BY-SA 4.0"). Measured against r10: the shape differs only in the
    underside lettering arc (about 0.6 mm deep); the molecule, the pencils and the rest of the base are unchanged
    (largest deviation outside the lettering 0.00006 mm). STL SHA-256
    61bbb8ec736087dbfad3fb423807465294afff81c257254bf4b07e0728b97f0b. Licence and attribution also in the 3MF
    metadata and in the header of each G-code; ready G-code re-sliced.
r10 (2026-10-27): package licence changed to CC BY-NC-SA 4.0; file names show product line, geometry release and
    package number. Same STL geometry as r01-r09 (SHA-256
    abfa003a846d6cc2dc4cc42ae3a849a1aea85b7c299c4bb859a32222adad0411), which stays available under CC BY-SA 4.0.
r01-r09 (2026-10-22 to 2026-10-27): CC BY-SA 4.0, file names caffeine_58-08-2_ANT-HOUSE.*; the STL SHA-256 of each
    earlier package is listed in that package's SHA256SUMS.txt.
