[Stack 5/7][Draft] Gemma4 manual processor tokenizer follow-up

[lesj0610]

summary

stack layer 5/7 for the non-TurboQuant Gemma4 core work.

this split isolates the manual processor/tokenizer wiring follow-up:

• ensure patched Gemma4 GGUF tokenizer is assigned back to the processor object

relation to upstream work

• this is a local manual follow-up
• it is not a direct copy of a separate upstream PR
• it builds on top of the GGUF/tokenizer glue split below it

notes

• keeping this separate makes it easier to drop or retain the processor fix without touching the rest of the GGUF stack

ai assistance was used for this change.

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[lesj0610]

superseded by the regrouped 5-layer Gemma4 core stack (#16, #17, #18, #21, #22).