fix(anthropic): map webp images explicitly#2304
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Fixes the Anthropic WebP part of #2204.
The Anthropic formatter was relying on
mimetypes.types_mapfor image media types. That map is platform/Python-install dependent, so.webpcan fall back toapplication/octet-streameven though Strands already acceptswebpas an image format.This keeps a small explicit map for the Anthropic image formats Strands supports and falls back to
mimetypesonly for unknown formats.Validation:
python -m pip install -e ".[anthropic]"python -m pytest tests/strands/models/test_anthropic.py -qpython -m ruff check src/strands/models/anthropic.py tests/strands/models/test_anthropic.pypython -m ruff format --check src/strands/models/anthropic.py tests/strands/models/test_anthropic.pygit diff --check