b11742

hybrid dna tokenizer fixes (#30825)

• vocab : support Carbon-14B HybridDNA tokenizer

Carbon-14B auto-tags untagged DNA runs and uses N-padded tail tokens
(tail=pad_n). Also strip whitespace inside tags and handle a stray
like the HF tokenizer.

• convert : fix special tokens and merges for older Carbon models

Carbon-500M/3B/8B don't register the Qwen added tokens and ship no
tokenizer.json, so take the token types, merges and special ids from the
base tokenizer.

• Update conversion/base.py

Co-authored-by: Sigbjørn Skjæret sigbjorn.skjaeret@scala.com

• Update src/llama-vocab.cpp

Co-authored-by: Sigbjørn Skjæret sigbjorn.skjaeret@scala.com

• Update src/llama-vocab.cpp

Co-authored-by: Sigbjørn Skjæret sigbjorn.skjaeret@scala.com

• Update src/llama-vocab.cpp

Co-authored-by: Sigbjørn Skjæret sigbjorn.skjaeret@scala.com

• Update conversion/base.py

Co-authored-by: Sigbjørn Skjæret sigbjorn.skjaeret@scala.com

• Update conversion/base.py

Co-authored-by: Sigbjørn Skjæret sigbjorn.skjaeret@scala.com

• Update conversion/base.py

Co-authored-by: Sigbjørn Skjæret sigbjorn.skjaeret@scala.com

• address review comments

• Update src/llama-vocab.cpp

Co-authored-by: Sigbjørn Skjæret sigbjorn.skjaeret@scala.com

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Co-authored-by: Sigbjørn Skjæret sigbjorn.skjaeret@scala.com

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• https://github.com/ggml-org/llama.cpp/attestations/57556991

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