b10773

server : accept data: URLs for input_video and input_audio (#27735)

• server : accept data: URLs for input_video and input_audio

input_video and input_audio passed accept_base64_uri=false to
handle_media(), so data: URLs got treated as raw base64 strings and
failed later with a confusing media probe error (#27724).

pass true for these two content types the same way image_url already
does, and allow video/audio mime types in the data: url check instead
of image only. data URL validation now throws std::invalid_argument so
malformed input comes back as 400 instead of 500, matching the other
input validation in this file.

• server : simplify handle_media and drop unused accept_base64_uri flag

• server : update comment and add unit test for invalid data URI MIME

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• https://github.com/ggml-org/llama.cpp/attestations/44868521

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