- measure every file part and every embedded image field the request
carries instead of the caller's image arg, so a transform that drops,
filters, or adds parts and a JSON body that smuggles extra_body
references all bill what the provider actually receives
- read seekable streams from offset 0 and restore the cursor, matching
how httpx serializes the part
- measure input_image* base64 fields on azure image generation the
same as edits
- merge top-level litellm_params pricing kwargs over nested model_info
in _deployment_model_info so custom pricing works on non-router calls
- reject bool and non-positive width/height in the size fallback and
clamp negative reference_pixels to zero
- prices_tokens now checks rates for non-zero values; get_model_info
normalizes absent token rates to 0, which made is not None always
true and zero-billed per-pixel models that return usage
d0730b51d7