LibRaw (rawpy 0.26.1, libraw 0.22.0) rejects Apple ProRAW Linear DNG with
'Unsupported file format or not RAW file'. These files aren't Bayer-pattern
RAW — they're TIFF containers holding an already-developed RGB image, so
PIL opens them directly. iPhone Linear DNG also has no embedded preview
exiftool can extract, so the existing fallback chain ran out of options.
Added PIL Image.open(src_path) as the last fallback in both code paths
(_generate_proxy_webp for /photos/{id}/proxy, and tasks.thumbs.process_raw_image
for thumbnail generation). Covers ~1,300 iPhone DNG files in the library
that were 415-ing on every detail view.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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