Axum's DefaultBodyLimit defaults to 2MB. Uploaded photos/videos exceed
this and were rejected with 400 before reaching the handler. Disable the
body limit on POST /api/v1/upload — size validation is already enforced
inside the handler via max_image_size_mb / max_video_size_mb config.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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